Porsche 928 MOT reliability

Porsche 928s passed their MOT first time 81% of the time across 656 tests in 2025. 774 are still licensed in Great Britain.

First-time pass rate

81%

MOTs analysed

656

Still licensed (GB)

774

Body type

Coupe

Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

1994 petrol

32 MOTs

These figures come from 32 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

Passed first time 91%. Typical mileage 83,501 (most between 45,325 and 101,335).

2005: 85% → 2006: 72% → 2007: 65% → 2008: 64% → 2009: 63% → 2010: 61% → 2011: 74% → 2012: 73% → 2013: 62% → 2014: 74% → 2015: 63% → 2016: 79% → 2017: 85% → 2018: 69% → 2019: 70% → 2020: 78% → 2021: 74% → 2022: 81% → 2023: 74% → 2024: 82% → 2025: 91%

Most common failures

Registration plate lamp(s): inoperative in the case of a single lamp or all lamps (3.1%)
Headlamp aim: too high (3.1%)
Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits (3.1%)
Rear fog lamp: not working (3.1%)
Washers: provides insufficient washer liquid (3.1%)

Where 1994 928s fail

Lights & electrics

6.3%

Exhaust, emissions & leaks

3.1%

Visibility & wipers

3.1%

Looking at a particular car?

See its own MOT history, mileage and red flags, compared with these figures. Free.

Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.