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A1 S Line 25 Tfsi S A

1,409 MOT tests analysed. sits above the UK fleet average — here's where A1 S Line 25 Tfsi S As pass, fail, and end up on the retest sheet.

That's 12.8 points above the UK fleet average across our 1,984 tracked models — a confident result.

Pass

90.3%

Pass-after-fix

2.8%

Fail

6.8%

Avg miles

27,330

Pass + Pass-after-fix + Fail = 100%

ULEZ compliant

Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.

UK ULEZ & CAZ guide →

Performance by cohort

2 year bands · 1,409 tests

Pass rate climbs 1.4 points across the cohorts — newer A1 S Line 25 Tfsi S A examples clear the test more reliably than the early cars.

2018–2020 cohort 548

Pass

89.4%

Fail

6.9%

PRS

3.6%

Avg mileage at test

30,245 mi

2021+ cohort 861

Pass

90.8%

Fail

6.7%

PRS

2.3%

Avg mileage at test

25,473 mi

Cohort = vehicle's first-registration year band. Same model, different generations of build.

The picture

A1 S Line 25 Tfsi S-A: a strong MOT record by UK norms

Across 1,409 MOT tests, the A1 S Line 25 Tfsi S-A returns 90.3% first-time pass — comfortably ahead of the UK fleet average. The single most-logged Major fail is windscreen damage. Tyre tread under the limit and a seriously damaged tyre round out the top three. Average tested mileage sits at 27,330, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.

Top ten reasons for rejection.

Filter failures:

  1. 01

    Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view

    33 occurrences · 2.3% of tests

  2. 02

    Tyre tread depth not in accordance with the requirements

    31 occurrences · 2.2% of tests

  3. 03

    A tyre seriously damaged

    27 occurrences · 1.9% of tests

  4. 04

    An obstruction within the driver's field of view that materially affects his view in front or to the sides outside the swept area of windscreen

    10 occurrences · 0.7% of tests

  5. 05

    a brake lining or pad worn below 1.5mm

    9 occurrences · 0.6% of tests

  6. 06

    Steering rack gaiter or ball joint dust cover damaged or deteriorated

    9 occurrences · 0.6% of tests

  7. 07

    Wiper blade defective

    7 occurrences · 0.5% of tests

  8. 08

    A tyre cords visible or damaged

    5 occurrences · 0.4% of tests

  9. 09

    Seat belt not functioning as intended or of an incorrect type

    5 occurrences · 0.4% of tests

  10. 10

    Wiper blade missing or obviously not clearing the windscreen

    4 occurrences · 0.3% 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 2 failures

£140£255

If every one of this A1 S Line 25 Tfsi S A'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 →

Try the calculator

Build your own retest budget.

Year-band analysis

Best year to buy. Worst to avoid.

First-time MOT pass rate split by registration band. A 1.4-point gap between bands is modest — the year you buy Audi A1 S Line 25 Tfsi S A makes a small but real difference to MOT outcomes.

Best band to buy

90.8%

2021+ registration

the 2021-on band climbs to 90.8% — a 1.4-point improvement. Failures here are mostly wear items: damaged but not adversely affecting driver's view, tread depth below requirements of 1.6mm — the structural issues that drag down older examples don't appear in the top-10 for this band. Post-2020 examples are early in their MOT life and generally show the cleanest records.

Band to be cautious about

89.4%

2018–2020 registration

On the 2018–2020 band, the data shows a 89.4% pass rate against a fleet average of 90.8% on the newer band. The main culprits logged at test: tread depth below requirements of 1.6mm, damaged but not adversely affecting driver's view, and has a cut in excess of the…. Average mileage on test for this band is 30,245 miles — high-mileage wear items are a recurring theme.

Best band to buy: 2021+ (90.8% first-time pass). Worst band to avoid: 2018-2020 (89.4% pass). That's a 1.4-point spread across 548 older tests and 861 newer ones — year of build makes a material difference on this model.

Year-spread leaderboard →

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.

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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.

What's good

One of the most desirable small hatchbacks around, the Audi A1 does more than just trade on its badge. It's a high quality, good to drive and refined car that is built to last.

Recent owner-reported faults

  1. 19 Jul 2019

    Report of 19,500 mile 2016 Audi A1 1.4 TFSI S Line manual failing to shift out of first gear wherever the lever is placed, accompanied by a strong smell of burning. After stirring the lever it eventually finds a gear it will change to, unsticks and the smell dissipates. Likely to be a failed cable gearshift head. **13-1-2020:** Report of failure of DQ200 7-speed S tronic in Audi A1 1.4 Twincharger 185PS at 40,000 miles. Original dealer looked at it, updated the DSG software and can't find a fault. However a local Audi dealer recommends changing the DSG unit. It also has a knocking when cold when the idle is under 1000.

  2. 18 Jun 2019

    Report of 2013 Audi A1 Sportback 1.4 TFSI Sport S tronic (DQ200) breaking down on 27th May 2019 at 27,000 miles. Diagnosis was "requires new mechatronics unit due to the seal and housing being out of shape causing it to leak". Owner wrote to Audi seeking their comments asking why the seal etc. was out of shape; had it been incorrectly fitted in the first place? Or following a previous service which had always been carried out by Audi. Original quote for the replacement unit was £2,104.94 incl. which was reduced to £1,824.87, plus major service and MoT.

  3. 14 Feb 2019

    Report of turbo of lightly used 2015 Audi A1 1.6 TDI failing at 13,000 miles sending parts into the engine and causing catastrephic engine failure. Audi dealer said owner was entirely blameless and is securing a new engine and turbo from Audi free of charge (£7,000) but wants to charge £2,000 in labour to fit the new engine and turbo.

  4. 24 Aug 2018

    Report of corroded and pitted rear brake discs on 2015 Audi A1 1.4 TFSI TS150 at 29,000 miles. Discs and pads replaced with no Audi items at owner's expense.

  5. 21 Aug 2018

    First, the turbo of a 2013 Audi A1 1.6TDI failed, then the ECU failed, both within 18 months of used purchase in 2017. Fortunately owner had a 2 year used car warranty.

  6. 22 Feb 2018

    Report of October 2014 Audi A1 1.6 TDI blowing up. 4.3 litre capacity sump contained 8.5 litres of oil. Car had previously been serviced at 13,807 miles 15 months previously and has passed its MoT with no advisories or excess fluid levels 3,102 miles and 4 months previously. We concluded that the engine suffered excessive post-injection of diesel to actively regenerate the DPF and that is what raised the oil level, causing it to blow up. 3**0-6-2018:** Mechatronics failure reported in 2013 Audi A1 Sportback 1.4 TFSi 122 S-tronic at 37,500 miles, bought used with full Audi service history.

  7. 3 Nov 2017

    Report of Audi dealer making an 'advisory' of a weeping rear damper on another 2014 Audi A1 at 23,000 miles its first MoT while the car was still under warranty. Dealer wanted £265 to replace the damper. Owner asked Audi to honour the valid warranty and to replace the deteriorating damper, which they categorically refused, stating that most modern cars have this problem. Reader then wrote formally to the Head of Business for the Franchise where the car was purchased from new, asking for the damper replacement and he also refused. His description of the problem as ''Misting'' was the third excuse given by Audi, as the Service personnel had variously described it as ''Weeping'' and ''Leaking''. Reader taking it to Small Claims.

  8. 13 Sep 2017

    Reader told that leaking rear damper on 23,000 mile 2014 Audi A1 found at its first MoT was "normal" for a modern car, would not be replaced under 3 year warranty, and if he wanted it replaced it would be £245.10.

  9. 26 Aug 2017

    Report of problems through the life of a January 2013 Audi A1 bought nearly new in April 2013: In September 2014 there was an issue with the power steering pump. This was followed in April 2015 by a fault with the fuel actuator; March 2016 a caliper sticking; April 2016 broken spring; and January 2017 another broken spring.

  10. 18 Jul 2017

    Emissions light came on immediately after NOx emissions fix of Audi A1 2.0 TDI. Probably a failed EGR.

  11. 18 Jul 2017

    Report of engine of September 2011 Audi A1 S Line 1.4 TSI Twincharger 185 completely failing at 65,000 despite the owner recently havind spent £3,000 on a repair to cure a "rattling noise". There had been low compression in all the valves, they removed the cylinder head, found the timing chain had stretced and the valves been damaged, they replaced the cylinder head, lots of gaskets were used, sealer seal rings, timing track and tensioners, etc replaced, oil filter coolant and supercharger water pump and they found supercharger pulley noisy also did a full oil service and filled with oil. 3 months later engine totally failed and dealer quoted £7,500 for a new engine which is more than the value of the car.

  12. 3 Jul 2017

    Report of EPC (Electronic Power Control) light coming on three times in an Audi A1. Local garage unable to fix. Likely to be the accelerator pedal switch needs replacing.

Source: honestjohn.co.uk · 30 reports indexed, top 12 shown

Buying or keeping an A1 S Line 25 Tfsi S A?

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 an A1 S Line 25 Tfsi S A 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.