BMW 3 Series Common Faults in the UK
F30 (2012–2019) / G20 (2019–present) — D-segment executive saloon and touring estate. The most popular used premium car in the UK by volume. Available in a wide range of engines: 316i, 318i, 320i, 330i petrols; 316d, 318d, 320d, 330d diesels; 330e plug-in hybrid. Saloon, Touring (estate), and Gran Turismo body styles. Updated 6 October 2026.
This guide covers the F30 (2012–2019) / G20 (2019–present) only. Older 3 Series generations have different engines and faults — for one of those, see how to check any car for known faults.
The BMW 3 Series (F30 2012–2019, G20 2019-on) rewards disciplined maintenance. On the pre-2015 N47 diesel, owners report the rear-mounted timing chain failing, an engine-out repair, so ask for chain history. The B47 diesel and B48 petrol that followed from 2015 are much better regarded. Full BMW-dealer or specialist service history is essential.
Largest DVSA recall for the 3 Series: R/2022/255, 322,745 vehicles in the whole recall — Undetected EGR System leaks may cause thermal activity in the intake manifold. See the 11 DVSA recalls listed for this model.
84.9% of BMW 3 Series cars registered 2013–2022 pass the MOT on the day (cars fixed during the test included), 3.7 points above all cars registered in those years (81.2%). These are the cars this guide covers that were 3 to 12 years old when DVSA tested them in 2025, counted from 27,065 DVSA tests; a pass with rectification at the station counts as a pass here, and as a failure in DVSA's own initial-test measure.
Counting every registration year DVSA holds for the BMW 3 Series (1999–2022), which includes generations this guide does not cover, 79.9% pass on the day (cars fixed during the test included), from 48,624 tests.
Source: DVSA MOT Anonymised Data 2025 (Open Government Licence v3.0), a sample of the 2025 file (about one test in ten, from nine months). Class 4 tests in Great Britain, test type NT (a normal annual test), retests excluded. A pass, or a pass with rectification at the station, counts as a pass here (passed on the day); DVSA's own initial-test measure counts a rectified pass as a failure and so reports a lower figure. Testing in Northern Ireland is run separately by the DVA under its own rules. Compared against cars of the same registration years, because pass rates otherwise mostly measure how old a model's surviving fleet is.
See it by registration year and by mileage ↓The asking-price figures above are the middle 80% and the median of what sellers were asking on Autoza on 29 October 2026 — not what buyers pay — for BMW 3 Series cars registered from 2012. They are worked out from the cars on sale when this page is generated, and none is shown when fewer than 10 cars qualify. The road tax line comes from GOV.UK's vehicle tax rate tables (2026/27 rates). The other quick-stats values are indicative editorial estimates aggregated from owner-forum sentiment, recall data and reliability surveys. We do not publish a UK price index, and no figure here should be quoted as one.
Best and worst years to buy
We name a year as a best or worst buy only where the DVSA MOT table further down does not rate it the other way.
2019 G20 generation: B48/B58 petrol and B47 diesel engines (all introduced from 2015), none of which carries the N47's rear timing-chain problem. New chassis is more refined, better equipped, and inherits all the reliability improvements BMW made after the N47 timing chain scandal. The G20 is the 3 Series to buy if budget allows, but it is not recall-free: DVSA lists R/2022/255 (engine software to detect EGR leaks) for 3 Series built up to July 2021, so a 2019–2021 car may be inside it, and the starter-motor recalls R/2025/405 (builds to June 2021) and R/2026/054 (builds from September 2020 to April 2025) reach G20 cars too. Check the registration on GOV.UK before buying. The DVSA MOT table on this page rates 2021 and 2022 registrations below all cars registered those years, so they are not named as best-buy years.
2012–2014 F30 with N47 diesel: the N47 2.0-litre diesel used in 316d, 318d, and 320d had a rear-mounted timing chain that stretched and failed prematurely, often at 60,000–95,000 miles. The repair requires removing the engine — costs of £3,000–£6,000 were common. Many N47 engines were replaced under extended warranty or goodwill; survivors without documented chain replacement are high-risk. The DVSA MOT table on this page rates 2013 and 2014 registrations above all cars registered those years, so they are not named as years to avoid.
Known faults — BMW 3 Series F30 (2012–2019) / G20 (2019–present)
How to read this list. This model’s DVSA safety recalls are listed in their own section below, largest first, each with DVSA’s reference and vehicle count. Everything else in this list is owner-reported: patterns that come up repeatedly with workshops, owner forums and reliability surveys. Those are worth checking on a viewing, but we hold no count of how many cars have each one, other than any survey share a card itself quotes. Treat an owner-reported item as a question to ask, not a fault this car has.
N47 diesel timing chain failure (F30 2012–2015)
- Symptoms
- Chain rattle on cold start; rattling from rear of engine; engine management light; in severe cases, sudden engine failure
- Years affected
- F30 2012–2015 with N47 diesel (316d, 318d, 320d) — From 60,000 miles; can occur earlier if oil changes were delayed
- Indicative repair (UK)
- £3,000–£6,000 timing chain replacement (rear-mounted chain requires engine removal); up to £10,000+ if the chain has jumped and damaged the engine
- What to check before buying
- This is the single most critical check on any F30 N47 diesel. The N47 chain is rear-mounted — listen for chain rattle at idle with the bonnet up. Ask for proof of timing chain replacement in the service history. If the chain has not been replaced and the car has over 75,000 miles, budget for the repair or walk away. The B47 diesel (post-2015 on the F30 facelift and all G20) is unaffected.
Electric water pump failure (N20/B46/B48 petrols)
- Symptoms
- Coolant warning light; engine overheating; steam from engine bay; loss of heat from heater
- Years affected
- F30 2012–2019 petrol models (N20 engine) — From 50,000 miles; often fails between 60,000–95,000 miles
- Indicative repair (UK)
- £600–£1,200 water pump replacement
- What to check before buying
- Check coolant level and condition. Ask about any history of overheating or coolant warning lights. The electric water pump on N20 engines is a known maintenance item — not catastrophic if caught early, but a failed pump can cause overheating if ignored. Budget for proactive replacement on high-mileage N20 cars.
320d/318d high-pressure fuel pump failure (N47)
- Symptoms
- Hard starting; rough idle; engine cutting out; fuel pressure fault codes
- Years affected
- F30 N47 diesel 2012–2015 — Above 75,000 miles
- Indicative repair (UK)
- £800–£1,500 high-pressure fuel pump replacement
- What to check before buying
- Check for any hesitation or hard-starting behaviour on the test drive. N47 high-pressure fuel pump failures are common above 75,000 miles. If this is a known issue on the specific car, negotiate accordingly.
EGS automatic gearbox selector module failure (ZF 8HP)
- Symptoms
- Gearbox warning light; "Transmission malfunction" message; car stuck in one gear; intermittent gear selection issues
- Years affected
- F30 2012–2019 (ZF 8-speed automatic) — Above 60,000 miles
- Indicative repair (UK)
- £400–£1,200 EGS module replacement; ZF gearbox service (fluid + filter) £300–£500
- What to check before buying
- Test the automatic gearbox through its full range — all gears, Sport mode, manual paddle shifts. Any hesitation, warning lights, or erratic behaviour requires investigation. Ask for ZF gearbox service history (fluid change every 35,000 miles prolongs life significantly).
AdBlue and NOx sensor faults (320d, 330d post-2015)
- Symptoms
- AdBlue warning light; countdown to start inhibit; P20EE NOx sensor fault code
- Years affected
- Post-2015 B47 diesel with AdBlue SCR system — Above 60,000 miles or 6 years old
- Indicative repair (UK)
- £200–£800 NOx sensor; AdBlue tank heater failure £400–£800
- What to check before buying
- Check AdBlue level and warning light status. NOx sensor failures are increasingly common on higher-mileage B47 diesels. Also check the AdBlue tank heater — failure causes the system to freeze in cold UK winters, triggering a start inhibit.
Front lower suspension arm bushes
- Symptoms
- Clunking over speed bumps; vague or wandering steering; vibration under braking
- Years affected
- All years above 50,000 miles — 50,000+ miles on UK roads
- Indicative repair (UK)
- £400–£800 front lower arm and bush replacement (both sides recommended)
- What to check before buying
- Drive at low speed over a speed bump and listen for clunks from the front. Front lower control arm bushes are a known wear item on both F30 and G20 at this mileage on UK roads. A ramp inspection makes this easy to spot.
DVSA safety recalls for the BMW 3 Series, largest first
These are the recalls DVSA lists for this model and its build years: every one of 10,000 or more vehicles, largest first, with DVSA’s own reference and figures. A recall covers only cars built in its dates and within its VIN range — check a particular car by registration through GOV.UK’s vehicle recall check. “Critical” here means DVSA’s own notice tells owners not to drive the car until it is fixed. It is never a size: “Large” means DVSA lists 10,000 or more vehicles in the recall.
- Safety recall · R/2022/255Large recall — 322,745 vehicles
Undetected EGR System leaks may cause thermal activity in the intake manifold
322,745 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 3 December 2014 and 12 July 2021 · recall launched 22 August 2022
- Safety recall · R/2022/206Large recall — 319,399 vehicles
The exhaust gas recirculation cooler may leak over time and cause thermal incident
319,399 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 9 December 2011 and 4 June 2019 · recall launched 1 August 2022
- Safety recall · R/2018/341Large recall — 225,449 vehicles
Exhaust gas recirculation module cooler could leak
The EGR cooler may leakpresenting a fire risk
225,449 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 9 December 2011 and 11 April 2017 · recall launched 7 December 2018
- Safety recall · R/2018/258Large recall — 153,602 vehicles
Exhaust gas recirculation cooler could potentially leak over time
The EGR cooler may leakpresenting a fire risk.
153,602 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 19 March 2015 and 22 November 2017 · recall launched 5 November 2018
- Safety recall · R/2024/403Large recall — 102,526 vehicles
Check Driver’s Airbag for Conversion Takata SDI & PSDI-5
Affected vehicles may have had a retrofit or conversion of the airbag using a previously recalled airbag variant which if deployed may do so with excessive force causing sharp metal fragments to be released this may cause serious injury possibly fatal to people in the vicinity.
102,526 vehicles of this model (DVSA’s figures added up) · built between 2 November 2011 and 8 November 2017 · recall launched 21 October 2024
- Safety recall · R/2023/016Large recall — 84,657 vehicles
A possible degradation of the propellant tablets could lead to an over-aggressive combustion in the event the airbag is activated which may cause the inflator body to rupture.
A possible degradation of airbag propellant tablets could lead to an over-aggressive combustion in the event the airbag is activated which may cause the inflator body to rupture.
84,657 vehicles of this model (DVSA’s figures added up) · built between 13 June 2012 and 30 June 2017 · recall launched 24 January 2023
5 more recalls of 10,000+ vehicles
- Safety recall · R/2021/037Large recall — 63,888 vehicles
The exhaust gas recirculation cooler could leak over time
63,888 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 30 June 2015 and 17 September 2018 · recall launched 9 February 2021
- Safety recall · R/2025/405Large recall — 36,549 vehicles
Replace the Engine Starter Motor
36,549 vehicles of this model (DVSA’s figures added up) · built between 26 October 2015 and 21 June 2021 · recall launched 27 October 2025
- Safety recall · R/2022/261Large recall — 25,982 vehicles
In rare cases the starter motor can inadvertently be activated permanently presenting a risk of a thermal event
25,982 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 15 September 2015 and 31 July 2018 · recall launched 12 September 2022
- Safety recall · R/2026/054Large recall — 24,004 vehicles
Replace the Engine Starter Motor
24,004 vehicles of this model (DVSA’s figures added up) · built between 18 September 2020 and 29 April 2025 · recall launched 2 March 2026
- Safety recall · R/2021/213Large recall — 18,330 vehicles
The exhaust gas recirculation module could leak over time
18,330 vehicles in the whole recall (DVSA’s figure for every model it covers) · built between 10 March 2017 and 1 October 2018 · recall launched 14 June 2021
Source: DVSA vehicle recalls file (every recall since 1992), published under the Open Government Licence. Where DVSA gives one figure for a recall that covers several models, it is shown as the whole recall’s total.
BMW 3 Series MOT results by year and mileage
Measured from DVSA’s own MOT test records for tests carried out in 2025, not from owner reports.
By registration year
Against all cars registered in the same year, the MOT pass rate for the 3 Series was higher in 6, lower in 2 and level in 2 of the 10 registration years from 2013 to 2022 with enough tests to measure. The widest gap below is 2022 registrations: 86.4% against 91.2% for all cars registered that year. The widest gap above is 2016 registrations: 86.5% against 79.4%.
Pass rate here: passed on the day, cars fixed during the test included. Rows: every BMW 3 Series DVSA tested in 2025, by registration year (2013–2022), all engines and fuels together.
| Registered | 3 Series | All cars that year | Difference |
|---|---|---|---|
| 20221,124 tests | 86.4% | 91.2% | −4.8 lower |
| 20212,314 tests | 87.8% | 90.1% | −2.3 lower |
| 20201,959 tests | 87.7% | 88.7% | −1.0 level |
| 20192,606 tests | 88.1% | 86.9% | +1.2 level |
| 20182,636 tests | 87.7% | 84.5% | +3.2 higher |
| 20173,257 tests | 87.1% | 82.2% | +4.9 higher |
| 20163,407 tests | 86.5% | 79.4% | +7.1 higher |
| 20153,180 tests | 83.2% | 76.7% | +6.5 higher |
| 20143,216 tests | 81.2% | 74.3% | +6.9 higher |
| 20133,366 tests | 77.6% | 71.9% | +5.7 higher |
By mileage at the test
Against cars of the same age on the same mileage, the pass rate for the 3 Series was higher in every one of the 8 mileage bands with enough tests. How other models compare at the same mileage.
Show the table by mileage (8 bands)
| Mileage | 3 Series | Same age and mileage | Difference |
|---|---|---|---|
| 20k–40k3,325 tests | 90.1% | 88.7% | +1.5 higher |
| 40k–60k6,356 tests | 87.7% | 83.0% | +4.7 higher |
| 60k–80k8,264 tests | 83.3% | 76.9% | +6.4 higher |
| 80k–100k8,618 tests | 78.8% | 71.6% | +7.2 higher |
| 100k–120k6,743 tests | 76.6% | 68.0% | +8.6 higher |
| 120k–140k5,223 tests | 73.7% | 66.3% | +7.4 higher |
| 140k–160k3,415 tests | 74.3% | 65.4% | +8.9 higher |
| 160k+4,519 tests | 72.4% | 65.4% | +6.9 higher |
Only a major or dangerous defect fails an MOT. A minor defect is recorded on the certificate and the car still passes, and an advisory is not a failure at all.
We don’t give a recall count for the BMW 3 Series: whether a recall applies depends on the individual car. Check the one you are looking at by entering its registration on GOV.UK’s vehicle recall checker, and see how to check a car for known faults for the other free checks.
Source: DVSA MOT Anonymised Data 2025 (Open Government Licence v3.0), a sample of the 2025 file (about one test in ten, from nine months) (3,459,000 tests). Class 4 tests in Great Britain, test type NT (a normal annual test), retests excluded. A pass, or a pass with rectification at the station, counts as a pass here (passed on the day); DVSA's own initial-test measure counts a rectified pass as a failure and so reports a lower figure. Odometer readings below 100 or above 400,000 miles are discarded as misreadings, and cars under three years old are excluded because no MOT is yet due. Sampled from nine months of 2025 (January, February, April, May, July, August, September, October and November). Testing in Northern Ireland is run separately by the DVA under its own rules. Registration years shown are cars 3 to 12 years old when tested; the smallest rests on 1,124 tests. A gap is called level when it is under one percentage point or inside the 95% sampling margin for that number of tests. Contains public sector information licensed under the Open Government Licence v3.0.
Who this car suits — and who should look elsewhere
Buyers who want a genuine driver's car and are prepared to maintain it properly. Motorway-mile buyers who will use the 320d's diesel efficiency on long UK commutes. Buyers with a BMW specialist garage lined up for servicing.
Buyers who want the lowest total cost of ownership — a Toyota Corolla or Skoda Octavia will cost meaningfully less to run. F30 N47 diesel buyers without verified timing chain history — this is a potentially catastrophic repair. First-time BMW buyers who plan to service it at the cheapest possible garage — BMW models require BMW-specific knowledge and fluids.
Alternatives to consider
If the BMW 3 Series doesn't suit, these comparable models are worth a look in the UK market:
- →Audi A4 common faults
- →Mercedes C-Class common faults
- →Skoda Octavia common faults
- →Volvo V60
- →Toyota Camry
BMW 3 Series: questions buyers ask
What are the most common faults on a used BMW 3 Series in the UK?
The BMW 3 Series (F30 2012–2019, G20 2019-on) rewards disciplined maintenance. On the pre-2015 N47 diesel, owners report the rear-mounted timing chain failing, an engine-out repair, so ask for chain history. The B47 diesel and B48 petrol that followed from 2015 are much better regarded. Full BMW-dealer or specialist service history is essential.
What is the best year to buy a used BMW 3 Series in the UK?
Best-buy years: 2019, 2020. 2019 G20 generation: B48/B58 petrol and B47 diesel engines (all introduced from 2015), none of which carries the N47's rear timing-chain problem. New chassis is more refined, better equipped, and inherits all the reliability improvements BMW made after the N47 timing chain scandal. The G20 is the 3 Series to buy if budget allows, but it is not recall-free: DVSA lists R/2022/255 (engine software to detect EGR leaks) for 3 Series built up to July 2021, so a 2019–2021 car may be inside it, and the starter-motor recalls R/2025/405 (builds to June 2021) and R/2026/054 (builds from September 2020 to April 2025) reach G20 cars too. Check the registration on GOV.UK before buying. The DVSA MOT table on this page rates 2021 and 2022 registrations below all cars registered those years, so they are not named as best-buy years.
What years of BMW 3 Series should I avoid in the UK?
Worst years: 2012. 2012–2014 F30 with N47 diesel: the N47 2.0-litre diesel used in 316d, 318d, and 320d had a rear-mounted timing chain that stretched and failed prematurely, often at 60,000–95,000 miles. The repair requires removing the engine — costs of £3,000–£6,000 were common. Many N47 engines were replaced under extended warranty or goodwill; survivors without documented chain replacement are high-risk. The DVSA MOT table on this page rates 2013 and 2014 registrations above all cars registered those years, so they are not named as years to avoid.
How much does a used BMW 3 Series cost in the UK in 2026?
What sellers were asking on Autoza on 29 October 2026, for BMW 3 Series cars registered from 2012: £5,295–£19,999, median £10,995 — the range is the middle 80% of asking prices. Those are asking prices, not what buyers paid, and not a UK price index. Prices vary by mileage, region and trim, so compare several adverts of the same year and mileage band before negotiating.
What is the road tax (VED) on a BMW 3 Series in the UK?
Annual road tax (VED): £200/year standard rate from the second year, hybrids included — the alternative-fuel discount ended on 1 April 2025. A car registered from April 2017 with a list price over £40,000 when new adds the £440/year Expensive Car Supplement in years 2–6 (£640 in all). Cars registered 2001–2017 pay a CO2 band, roughly £20–£790/year (2026/27 rates).
What real-world fuel economy does a BMW 3 Series achieve on UK roads?
Typical real-world consumption: 47–57 mpg (320d real-world UK mixed motorway); 35–44 mpg (320i petrol real-world).
How does a BMW 3 Series compare to its rivals?
Strong alternatives in the UK: Audi A4, Mercedes C-Class, Skoda Octavia, Volvo V60, Toyota Camry. Choose based on dealer network in your area, parts availability, and your priorities (running cost vs. cabin quality vs. badge).
Who is the BMW 3 Series most suitable for?
Buyers who want a genuine driver's car and are prepared to maintain it properly. Motorway-mile buyers who will use the 320d's diesel efficiency on long UK commutes. Buyers with a BMW specialist garage lined up for servicing.
Who should NOT buy a BMW 3 Series?
Buyers who want the lowest total cost of ownership — a Toyota Corolla or Skoda Octavia will cost meaningfully less to run. F30 N47 diesel buyers without verified timing chain history — this is a potentially catastrophic repair. First-time BMW buyers who plan to service it at the cheapest possible garage — BMW models require BMW-specific knowledge and fluids.
Are there safety recalls on the BMW 3 Series?
DVSA lists 11 safety recalls for the BMW 3 Series that this guide shows or names, the largest first: R/2022/255 (322,745 vehicles in the whole recall, built between 3 December 2014 and 12 July 2021): Undetected EGR System leaks may cause thermal activity in the intake manifold; R/2022/206 (319,399 vehicles in the whole recall, built between 9 December 2011 and 4 June 2019): The exhaust gas recirculation cooler may leak over time and cause thermal incident; R/2018/341 (225,449 vehicles in the whole recall, built between 9 December 2011 and 11 April 2017): Exhaust gas recirculation module cooler could leak. Whether a particular car is affected depends on its build date and VIN, so check its registration on GOV.UK (gov.uk/check-vehicle-recall) before you buy.
Is the N47 diesel timing chain failure (F30 2012–2015) on the BMW 3 Series a serious problem?
Owner-reported, frequency unknown: N47 diesel timing chain failure (F30 2012–2015) comes up in owner forums and workshop reports for the BMW 3 Series, but how often it happens is not known, so treat it as a question to ask rather than a fault every car has. Symptoms: Chain rattle on cold start; rattling from rear of engine; engine management light; in severe cases, sudden engine failure. Years affected: F30 2012–2015 with N47 diesel (316d, 318d, 320d). From 60,000 miles; can occur earlier if oil changes were delayed. Indicative repair cost in the UK: £3,000–£6,000 timing chain replacement (rear-mounted chain requires engine removal); up to £10,000+ if the chain has jumped and damaged the engine. What to check before buying: This is the single most critical check on any F30 N47 diesel. The N47 chain is rear-mounted — listen for chain rattle at idle with the bonnet up. Ask for proof of timing chain replacement in the service history. If the chain has not been replaced and the car has over 75,000 miles, budget for the repair or walk away. The B47 diesel (post-2015 on the F30 facelift and all G20) is unaffected.
Is the Electric water pump failure (N20/B46/B48 petrols) on the BMW 3 Series a serious problem?
Owner-reported, frequency unknown: Electric water pump failure (N20/B46/B48 petrols) comes up in owner forums and workshop reports for the BMW 3 Series, but how often it happens is not known, so treat it as a question to ask rather than a fault every car has. Symptoms: Coolant warning light; engine overheating; steam from engine bay; loss of heat from heater. Years affected: F30 2012–2019 petrol models (N20 engine). From 50,000 miles; often fails between 60,000–95,000 miles. Indicative repair cost in the UK: £600–£1,200 water pump replacement. What to check before buying: Check coolant level and condition. Ask about any history of overheating or coolant warning lights. The electric water pump on N20 engines is a known maintenance item — not catastrophic if caught early, but a failed pump can cause overheating if ignored. Budget for proactive replacement on high-mileage N20 cars.
Is the 320d/318d high-pressure fuel pump failure (N47) on the BMW 3 Series a serious problem?
Owner-reported, frequency unknown: 320d/318d high-pressure fuel pump failure (N47) comes up in owner forums and workshop reports for the BMW 3 Series, but how often it happens is not known, so treat it as a question to ask rather than a fault every car has. Symptoms: Hard starting; rough idle; engine cutting out; fuel pressure fault codes. Years affected: F30 N47 diesel 2012–2015. Above 75,000 miles. Indicative repair cost in the UK: £800–£1,500 high-pressure fuel pump replacement. What to check before buying: Check for any hesitation or hard-starting behaviour on the test drive. N47 high-pressure fuel pump failures are common above 75,000 miles. If this is a known issue on the specific car, negotiate accordingly.
Check these next
The guide above is about the BMW 3 Series as a model. These are about the car in front of you.
- Browse BMW 3 Series listings on AutozaEvery one listed now.
- Check any car by its registrationFree: its MOT history, tax status and any open recall, from a number plate.
- Work out the road tax for the 3 SeriesVehicle tax (VED) by registration date, CO2 and list price.
- Work out the monthly payment on a £10,995 3 SeriesThe median asking price on Autoza on 29 October 2026, not what buyers pay: change it to the car you are looking at.
- What is your 3 Series worth?A price range from dealers' asking prices for comparable cars.
Looking to buy a BMW 3 Series in the UK?
Search Autoza listings filtered by year, mileage, and region. Every dealer page shows the business name, address and contact details, so you can check the business before you enquire.