The picture
79% pass rate, spring failures and DSG caveats
79.3% first-time pass across 209,951 tests makes the Leon one of the stronger performers in this batch. Average test mileage of 77,623 means most failures are mid-life wear rather than neglect. Tyre tread leads the list, followed by fractured springs and brake pad wear below 1.5mm — none of it exotic, all of it catchable. Where owners add texture: MOLL batteries failing at two years old and 50,000 miles, with one AA technician noting he'd replaced a significant number on SEAT models (SEAT declined to cover the cost on at least one occasion). A 2016 rear damper was found to be misting fluid at just 15,000 miles, replaced under warranty. DSG transmission issues have been reported on the 2017 FR trim. None of these are batch-killers, but the battery and damper patterns are worth a pre-purchase check on examples past the warranty window.
Top ten reasons for rejection.
- 01
Tyre tread depth not in accordance with the requirements
6,481 occurrences · 3.1% of tests
- 02
A spring or spring component fractured or seriously weakened
6,110 occurrences · 2.9% of tests
- 03
a brake lining or pad worn below 1.5mm
4,506 occurrences · 2.1% of tests
- 04
A shock absorber damaged to the extent that it does not function or showing signs of severe leakage
4,335 occurrences · 2.1% of tests
- 05
A transmission shaft constant velocity joint boot severely deteriorated
4,284 occurrences · 2.0% of tests
- 06
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
4,250 occurrences · 2.0% of tests
- 07
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
3,515 occurrences · 1.7% of tests
- 08
A tyre cords visible or damaged
3,290 occurrences · 1.6% of tests
- 09
A tyre seriously damaged
2,457 occurrences · 1.2% of tests
- 10
Wiper blade missing or obviously not clearing the windscreen
2,190 occurrences · 1.0% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 3 failures
£220–£495
If every one of this Leon's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Tools that pre-empt a retest.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
Item 01 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
Item 02 · Amazon UK
Brake pad measurement gauge
Testers fail pads under 1.5mm. A wear gauge tells you if you've got two months left or two weeks.
Search Amazon UK
Owner reports · Honest John
What owners actually report.
Verbatim faults logged by owners on honestjohn.co.uk over recent years. We didn't summarise — these are the words people typed in.
Where it falls short
Ride can have a firm edge on lower trim models.
Recent owner-reported faults
- 4 Dec 2019
Report of failure of MOLL battery in SEAT Leon at 2 years old and 50,000 miles. AA fitted new battery at a cost of £230 and told owner he had replaced a lot of MOLL batteries on SEATs. SEAT declined to pay for the battery. (See 4-10-2018) Kwikset 405DL-S Delta Keyed Entry Door Leverset With Smartkey Satin Nickel Door Hardware Door Levers Keyed Entry Door Levers Kwikset, 405DL-S, Door Levers, Delta, Door Hardware, Keyed Entry Door Levers, Delta Keyed Entry Door Leverset with SmartKey by Kwikset A ...Ferguson Home
- 29 Oct 2019
Problem reported with DSG transmission of 2017 SEAT Leon FR purchased in Jerusalem.
- 24 Oct 2019
Report of 2016 SEAT Leon needing new rear damper because it was "misting" (leaking fluid) at 15,000 miles. FoC under warranty, but dealer recommended replacing the other as well at a cost of £200.
- 13 Sep 2019
Report of ACC front assist not available warning light on on 2017 SEAT Leon 1.4 EcoTSi 150 DSG Auto Start/Stop FR Technology. (Yellow triangle). Car serviced yesterday and apparently the sensor needs recalibrating at a cost of £400, not covered in the warranty. With this particular sensor off the cruise control does not work either.
- 5 Sep 2019
Problem reported with DQ200 7-speed dry clutch DSG in 2014 SEAT Leon FR 1.8TSI 180. Error notice on and off: "ERROR: WORKSHOP! ONLY LEAVE VEHICLE IN POSITION P." Owner also notices that sometimes the car automatically switches to the Sports Mode gears while driving, or, more rarely, starts with the Sports Mode directly. With a scanner, he picked up error code: 617752- Selector lever Park position Lock switch. He thinks there is a Technical Service Bulletin for the 617752 error (recommendation to replace gear selector/ shifter assembly?). But online forums have different suggestions.
- 15 Jul 2019
Ongoing issues with the 1.5 TSI engine with no resolution from SEAT. (These were resolved by a Software update from September 2019.)
- 30 May 2019
Report that 2014 SEAT Leon 1.6 TDi 105 Ecomotive needed new turbo and DPF at a cost of £3,820, but garage then discovered that it needed a replacement engine as well. Replacement engine fitted FoC.
- 16 May 2019
Report of SEAT Leon 1.2TSI engine using 1 litre of oil every 1,000 miles.
- 3 Apr 2019
Report of turbo actuator of 2015 SEAT Leon 1.4TSI 150 FR failing three times in 28,000 miles.
- 8 Dec 2018
Report of catastrophic oil loss from engine of 2014 SEAT Leon 1.2TSI (VIN: VSSZZZ5FZER096473) in France. A few minutes before the oil loss, owner heard a faint rattling. French SEAT dealer refused to repair it until they had received confirmation from SEAT that SEAT would pay for the repair. Apparently, this has now been given but the garage now claims that it are waiting for the equipment needed to effect the repair. Owner told that defect itself concerns a pulley coming adrift inside the cylinder head. See 17-7-2018. Likely to be why timing belt replacement on EA211s is being scheduled at 4 years old.
- 2 Nov 2018
Report of failure of DQ200 7-speed dry clutch DSG transmission in 2013 SEAT Leon 1.8TSI at 35k miles. Car serviced annually by a "specialist". Dealer asking almost £5k to replace.
- 9 Oct 2018
Report of Mechatronics of 2014 SEAT Leon failing (presumed DQ200 7-speed dry clutch DSG). Owner quoted £1,400 to repair.
Source: honestjohn.co.uk · 30 reports indexed, top 12 shown
Buying or keeping a Leon?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Leon and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.