Ford Focus vs SEAT Leon: which is the better used buy?

On DVSA MOT records the SEAT Leon is the more reliable used buy: it passes its first MOT 1.1 percentage points more often than the Ford Focus once both are compared against what the national fleet scores at the same age. That comparison covers 112,415 real tests, not a survey.

MOT first-time pass rate

Counted from DVSA’s anonymised MOT test records. “vs age-matched” compares each model against what the national fleet scores at the same age — the only fair better-or-worse number, because an older fleet fails more whatever its build quality.

Model	Pass rate	Age-matched national	Difference	Tests
Ford Focus	74.7%	74.8%	-0.1	93,066
SEAT Leon	80.1%	79.1%	+1	19,349

Source: DVSA MOT Anonymised Data 2025 (Open Government Licence v3.0). National first-time pass rate 77.3%. Applies to Great Britain — Northern Ireland is tested by the DVA under a separate manual.

Ford Focus

Mk4, 2018–2025 · compact family hatch

The Mk4 Ford Focus (2018–2025) drives brilliantly, but the 1.0 EcoBoost wet belt remains the critical check — the design caused engine-destroying failures on the previous Mk3 generation, and while Mk4 belts are revised, they are still a wear item that must be inspected or changed at 60,000 miles or 7 years. The 1.5 EcoBlue diesel suffers oil dilution on short journeys. Best-buy: 1.0 EcoBoost 2021+ with documented belt evidence. Worst: early Mk4 (2018–2019) 1.0 EcoBoost with no belt history.

What goes wrong

1.0 EcoBoost wet-belt failurecritical
Loss of compression; check engine; belt debris in oil; in worst case complete engine destruction
All Mk4 1.0 EcoBoost — early cars (2018–2019) highest risk; belts revised on later builds · Belt should be inspected/changed at 60,000 miles or 7 years · Belt + tensioner + labour: £700–£1,100 preventatively. Engine rebuild after failure: £4,500–£7,000.
Check: Service history MUST show wet-belt change at correct interval. No record = walk away. Oil pan inspection at independent garage is the best confirmation.
1.5 EcoBlue diesel oil dilutionmajor
Engine oil level rising between services; oil smells of diesel
1.5 EcoBlue diesel, all years · Service interval reduction; in worst cases injector replacement £600–£1,200
Check: Dipstick check pre-purchase: if oil level above max line, oil dilution is occurring.
Rear suspension bushing wearminor
Knocking over rough surfaces; vague handling
All Mk4 · 75,000+ miles · £250–£450
Check: Rough-road portion of test drive.
SYNC 3 / SYNC 4 infotainment glitchesminor
Screen freezes; CarPlay disconnects; reboot needed
2018–2021 · Free at Ford dealer software update
Check: Test infotainment fully during inspection.

Typical asking price:: £11,000–£22,000 (2018–2025)
Real-world economy:: 44–51 mpg real-world for 1.0 EcoBoost 125PS
Vehicle tax:: £200/year standard rate from the second year, hybrids included — the alternative-fuel discount ended on 1 April 2025. Cars registered 2001–2017 pay a CO2 band, roughly £20–£790/year (2026/27 rates).
Best years:: 2021, 2022, 2023
Years to avoid:: 2018, early 2019

Full Focus fault guide Used Fords

SEAT Leon

Mk3 2012–2020, Mk4 2020+ · compact family hatchback / estate

The SEAT Leon is one of the UK's best-value compact hatches, sharing its MQB platform with the VW Golf. The Mk3 (2012–2020) is strong overall but the 1.4 TSI engine has documented timing chain stretch on pre-2015 units and the DSG6 dual-clutch has known mechatronic faults. The Mk4 (2020+) is significantly improved with better infotainment and more reliable DSG7. Best buy: 2021+ Mk4 1.5 eTSI mild hybrid. Worst: Mk3 2013–2014 1.4 TSI ACT with high mileage.

What goes wrong

1.4 TSI ACT timing chain (Mk3 pre-2015)major
Rattling from engine on cold start; timing chain warning light; rough idle
2012–2014 (1.4 TSI ACT variant) · Can occur from 50,000 miles · £600–£1,400 timing chain kit replacement
Check: On cold start, listen for a rattle from the top of the engine for 5–10 seconds. Check for VAG timing chain update in service history. Post-2015 1.4 TSI revised the chain tensioner and is significantly better.
DSG6 mechatronic unit (Mk3 2012–2016)major
Judder or shudder from standstill; harsh downshift; gearbox warning light
Mk3 2012–2016 (DSG6 dual-clutch) · Above 50,000 miles · £600–£1,200 mechatronic repair; £2,000–£3,500 full DSG replacement
Check: Test in slow traffic and from cold. The DSG6 (DQ250) on early Mk3 is prone to mechatronic valve body faults. DSG7 (DQ381) on Mk4 is significantly more reliable. A fluid change (£200–£300) often helps early-stage judder.
Oil consumption — 1.4 TSI and 1.8 TSImoderate
Oil warning light between services; need to top up 0.5–1L per 1,900 miles
Mk3 2012–2018 (1.4 and 1.8 TSI variants) · £300–£600 piston ring replacement if excessive; ongoing top-up cost if minor
Check: Check oil level on dipstick during inspection. Ask seller when oil was last topped up and how often. Minor consumption (0.5L / 3,100 miles) is normal for TSI engines; above 1L / 1,900 miles is a concern.
Infotainment — MIB2 freezing (Mk3)minor
MIB2 touchscreen unresponsive; navigation reboots; Bluetooth drops
Mk3 2016–2020 (MIB2 system) · £0 — VAG dealer software update; or £180–£350 headunit firmware update
Check: Test all touchscreen functions during test drive. Most MIB2 freezing is resolved by a dealer software update (£0 if still under warranty; free good-will action on older cars at SEAT dealers).

Typical asking price:: Mk3: £3,000–£15,000 (2012–2020; Cupra higher) | Mk4: £9,000–£25,000 (2020–2023)
Real-world economy:: 44–51 mpg (1.5 eTSI mild hybrid, real-world UK mixed); 54–63 mpg (1.6 TDI diesel)
Vehicle tax:: £200/year standard rate from the second year, hybrids included — the alternative-fuel discount ended on 1 April 2025. Cars registered 2001–2017 pay a CO2 band, roughly £20–£790/year (2026/27 rates).
Best years:: 2021, 2022, 2023
Years to avoid:: 2013, 2014

Full Leon fault guide Used SEATs

Which one suits you

Ford Focus

Good for: Driver-focused family buyers; commuters wanting small petrol; buyers who can verify wet-belt change documentation.

Less good for: Anyone considering a sub-£10k 1.0 EcoBoost without belt-change evidence.

SEAT Leon

Good for: Buyers wanting Golf-level engineering at a lower price. Family buyers who need the Leon ST (estate) for boot space. Performance fans who want the CUPRA Leon. Buyers doing mixed town/motorway commutes.

Less good for: Buyers who want the simplest possible ownership — the Golf has better dealer network depth in the UK. Mk3 DSG6 buyers doing city-only miles — judder is near-certain above 60,000 miles. Pre-2015 1.4 TSI ACT buyers without verified chain service.

Frequently Asked Questions

Which is more reliable, the Ford Focus or the SEAT Leon?

The SEAT Leon. It passes its first MOT 1.1 percentage points more often than the Ford Focus once both are age-adjusted, across 112,415 DVSA-recorded tests.

What is the MOT pass rate for the Ford Focus?

74.7% of Ford Focuss pass their MOT first time, from 93,066 tests in DVSA's records. The national first-time rate is 77.3%, but cars of this model's age average 74.8% — so it runs 0.1 points worse than its age group.

What is the MOT pass rate for the SEAT Leon?

80.1% of SEAT Leons pass their MOT first time, from 19,349 tests. Against the 79.1% that cars of its age average, it runs 1 points better.

Which years should I avoid?

For the Ford Focus, Early Mk4 1.0 EcoBoost wet-belt failures were catastrophic when they occurred — £4,000+ engine rebuild on a £15k car. For the SEAT Leon, Early Mk3 (2013–2014) 1.4 TSI ACT units had timing chain stretch and oil consumption issues before a VAG service update. These are the highest-risk SEAT Leons on the UK used market.

Which is cheaper to run?

The Ford Focus returns 44–51 mpg real-world for 1.0 EcoBoost 125PS in real UK driving; the SEAT Leon returns 44–51 mpg (1.5 eTSI mild hybrid, real-world UK mixed); 54–63 mpg (1.6 TDI diesel). Vehicle tax: Focus — £200/year standard rate from the second year, hybrids included — the alternative-fuel discount ended on 1 April 2025. Cars registered 2001–2017 pay a CO2 band, roughly £20–£790/year (2026/27 rates).; Leon — £200/year standard rate from the second year, hybrids included — the alternative-fuel discount ended on 1 April 2025. Cars registered 2001–2017 pay a CO2 band, roughly £20–£790/year (2026/27 rates).. Insurance differs mainly by driver and postcode rather than by model, so treat any model-level insurance figure with caution.

MOT figures are counted from DVSA records and are the only measured statistic here. Prices, economy and tax bands are indicative and vary by specification, condition and where the car has lived. Last reviewed: 2026-08-14 / 2026-08-14.