2018 Porsche 911 · 11,299 MOT tests
2018 Porsche 911 reliability
2018 Porsche 911s fail 5.2% of first MOT tests, 54% fewer MOT fails than the average car its age and mileage, ranking 21 of 25 911 years (11,299 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Porsche 911s: 10.4%)
- 5.2%
- first-time fail rate (all Porsche 911s: 10.4%)
- fails than cars of the same age and mileage
- 54% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 15,273
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 11,299
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 70% fewer MOT fails than the average car its age (the 2018 car does worse)
- 2019 cars: 63% fewer MOT fails than the average car its age (the 2018 car does worse)
- Strong point: lights and electrics, 57% fewer fails than comparable cars.
- Plates: a 2018 car carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
Common problems
What fails on a 2018 Porsche 911
Fail rate by area
- Tyres2.5%
- Lights and electrics1%
- Number plates and VIN0.9%
- Windscreen, wipers and mirrors0.4%
- Exhaust, emissions and leaks0.2%
- Suspension0.2%
- Brakes0.1%
Average for cars of the same age and mileage
Top failures
Tyre ply or cords exposed 0.81%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Tyre cut reaching ply or cords 0.58%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Number plate does not meet standards 0.36%
The plate does not meet legal specifications, so it must be replaced with a compliant one before the car is driven.
Tyre tread below 1.6mm 0.32%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Headlamp aim set too high 0.2%
Headlamps aimed too high can dazzle other drivers, and adjusting them is usually a quick job.
Number plate missing or insecure 0.19%
A missing or loose number plate is illegal and must be fixed before the car is used on the road.
Common advisories
Tyre worn close to legal limit (4.31%) · Tyre slightly damaged or cracking (1.99%) · Nail in tyre, monitor (1.09%) · Tyre worn close to legal limit (0.58%) · Tyre has a shallow cut (0.56%) · Brake disc pitted or scored (0.42%)
Other years
Every Porsche 911 year
The full picture: Porsche 911 reliability. Before you pay for any Porsche 911, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2018 Porsche 911 reliable?
2018 Porsche 911s fail 5.2% of first MOT tests, 54% fewer MOT fails than the average car its age and mileage, ranking 21 of 25 911 years (11,299 DVSA tests, 2022 to 2024).
What fails on a 2018 Porsche 911 MOT?
Most often tyre ply or cords exposed (0.81% of tests), tyre cut reaching ply or cords (0.58% of tests), number plate does not meet standards (0.36% of tests).
How many miles should a 2018 Porsche 911 have done?
At its MOT aged about 5, a typical 2018 Porsche 911 shows 15,273 miles. Much higher or lower is worth asking about.
What plate is a 2018 car?
A car first registered in 2018 carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
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