Common Porsche 911 Problems, Faults, and Repair Costs
Typical MOT issues to check on the Porsche 911, with rough repair costs, and its MOT pass rate for each model year. Based on 117,064 MOT tests across 32 model years (DVSA data for tests carried out in 2024, retests included).
Segment: luxury | Fuel: Petrol, LPG
92%
Porsche 911 pass rate
92%
Porsche average
82%
All-model average
The Porsche 911 has an average MOT pass rate of 92%, which is equal to the Porsche average and 10 points above the average across all models in our data. Newer Porsche 911s pass their MOT more often than older ones, by 5 percentage points on average, which is mostly down to age and wear.
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Common MOT Issues to Check on the Porsche 911
Typical issues for a car of this age and type, estimated from its age, fuel type and engine size (not counted from its MOT records), with rough repair costs
Brakes
High likelihood£80 - £450
Typical repair cost
Common advisories:
Brake discs worn, brake pads thin, handbrake adjustment needed
Failure points:
Brake disc excessively worn, brake pipe corroded, brake efficiency below minimum
Suspension
High likelihood£150 - £600
Typical repair cost
Common advisories:
Suspension arm bush worn, shock absorber misting, spring corroded
Failure points:
Coil spring broken, ball joint excessive play, shock absorber leaking
Lights
High likelihood£15 - £200
Typical repair cost
Common advisories:
Headlamp aim slightly out, lens deteriorated
Failure points:
Headlamp not working, brake light not functioning, indicator failure
Tyres
High likelihood£50 - £300
Typical repair cost
Common advisories:
Tyre approaching legal limit, slight damage to sidewall
Failure points:
Tyre below minimum tread depth, tyre has a cut exposing ply
Exhaust & Emissions
High likelihood£80 - £800
Typical repair cost
Common advisories:
Exhaust mounting corroded, slight exhaust leak
Failure points:
Exhaust emissions exceed limits, catalytic converter efficiency low, DPF warning
Steering
High likelihood£100 - £500
Typical repair cost
Common advisories:
Track rod end has slight play, steering rack boot deteriorated
Failure points:
Steering rack leaking, track rod ball joint worn beyond limits
Body & Structure
High likelihood£200 - £1200
Typical repair cost
Common advisories:
Surface corrosion on subframe, slight body panel damage
Failure points:
Structural corrosion, body mounting corroded through, chassis weakness
Windscreen & Wipers
Lower likelihood£10 - £350
Typical repair cost
Common advisories:
Minor windscreen chip, wiper blade deteriorated
Failure points:
Windscreen crack in swept area, wiper does not clear windscreen
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Porsche 911 Reliability by Year
MOT pass rate for each model year, from DVSA data for tests carried out in 2024 (retests included). Newer cars usually pass more often simply because they are younger. Highest and lowest are marked among years with 100+ tests that were at least three years old when tested. Fuel and engine size are a guide only.
| Year | Fuel | Engine | Pass Rate | Fail Rate |
|---|---|---|---|---|
| 2021 | Petrol | 3.0L | 100% | 0% |
| 2020 | Petrol | 3.0L | 97% | 2% |
| 2019 | Petrol | 4.0L | 97% | 3% |
| 2018 | Petrol | 4.0L | 96% | 3% |
| 2017 | Petrol | 4.0L | 97% | 2% |
| 2016 | Petrol | 4.0L | 97% | 2% |
| 2015 | Petrol | 4.0L | 97% | 3% |
| 2014 | Petrol | 3.8L | 96% | 3% |
| 2013 | Petrol | 3.4L | 96% | 4% |
| 2012 | Petrol | 3.8L | 95% | 5% |
| 2011 | Petrol | 3.8L | 95% | 5% |
| 2010 | Petrol | 3.8L | 94% | 5% |
| 2009 | Petrol | 3.8L | 92% | 7% |
| 2008 | Petrol | 3.8L | 92% | 8% |
| 2007 | Petrol | 3.8L | 90% | 9% |
| 2006 | Petrol | 3.8L | 90% | 9% |
| 2005 | Petrol | 3.8L | 90% | 10% |
| 2004 | Petrol | 3.8L | 88% | 11% |
| 2003 | Petrol | 2.2L | 87% | 12% |
| 2002 | Petrol | 3.6L | 86% | 13% |
| 2001 | Petrol | 3.6L | 88% | 12% |
| 2000 | LPG | 3.4L | 86% | 12% |
| 1999 | Petrol | 3.4L | 87% | 12% |
| 1998 | Petrol | 3.6L | 85% | 13% |
| 1997 | Petrol | 3.8L | 90% | 9% |
| 1996 | Petrol | 3.6L | 91% | 8% |
| 1995 | Petrol | 3.6L | 89% | 10% |
| 1994 | Petrol | 3.5L | 91% | 9% |
| 1993 | Petrol | 3.6L | 91% | 8% |
| 1992 | Petrol | 3.6L | 94% | 5% |
| 1991 | Petrol | 3.2L | 91% | 7% |
| 1990 | Petrol | 3.6L | 91% | 8% |
Highest Pass Rate
2019
97% pass rate from 7,188 tests
Level with 2015, 2016, 2017 and 2020
View 2019 Porsche 911 detailsPorsche 911 Running Costs
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What are the most common Porsche 911 problems?
Typical issues to check on a Porsche 911 of this age and type are brakes, suspension, lights, tyres, exhaust & emissions, steering and body & structure. These are estimated from its age, fuel type and engine size, not counted from its MOT records. Across 117,064 MOT tests (DVSA MOT data for tests in 2024, retests included), 92% ended in a pass.
Is the Porsche 911 reliable?
The Porsche 911 has an average MOT pass rate of 92%, from 117,064 MOT tests. That is 10 points above the average across all models in our data (82%), a better than average result. Pass rates fall as cars age, so compare it with cars of a similar age.
Which year Porsche 911 is the most reliable?
Of the years with at least 100 tests that were old enough for a routine MOT, the 2019 Porsche 911 has the highest MOT pass rate: 97% of its 7,188 tests ended in a pass. The 2015, 2016, 2017 and 2020 are level on 97%. The 1998 has the lowest at 85%. Newer cars usually pass more often simply because they are younger, so the pass rate is only part of the picture.
How much does it cost to fix common Porsche 911 faults?
As a rough guide, brake work on a Porsche 911 typically costs £80-£450 and suspension repairs £150-£600, while exhaust and emissions fixes can cost £80-£800. Lighting and wiper fixes are usually under £200.
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Other Porsche Models
Common problems pages for other Porsche models