MOT reliability

Porsche 911 c4

Q: Is the Porsche 911 c4 reliable?

Across 1 Porsche 911 c4 vehicles in our MOT data, 69% pass the MOT (a 31% failure rate), with about 2.4 faults or advisories recorded per test.

Q: What is the average mileage of a Porsche 911 c4?

The typical Porsche 911 c4 in our data has covered around 123,173 miles.

1 vehicles · 26 completed MOT tests analysed

69%

MOT pass rate

Based on 1 Porsche 911 c4 vehicles and 26 completed MOT tests, the Porsche 911 c4 has an overall 69% pass rate, with an average recorded mileage of 123,173 miles.

Vehicles

MOT tests

1,886

Avg miles / year

2.4

Faults per test

Dangerous-fault share

Porsche 911 c4 problem areas

Where faults occur most across all Porsche 911 c4 MOT tests:

Other68%
Lamps & electrical11%
Emissions & nuisance10%
Seatbelts & equipment5%
Tyres, wheels & suspension5%
Identification & plates3%
Steering2%
Body & structure2%

Porsche 911 c4 pass rate by age

Age (years)	Tests	Pass rate
7	2	50%
8	1	100%
9	2	50%
10	1	100%
11	1	100%
12	2	50%
13	2	50%
14	2	50%
16	1	100%
17	1	100%
18	1	100%
19	1	100%
20	1	100%

Fuel types: Petrol (1)

Most common Porsche 911 c4 MOT faults

These are the faults and advisories recorded most often across Porsche 911 c4 MOT tests:

Offside Rear Tyre worn close to the legal limit (4.1.E.1) (3 times)
Nearside Rear Brake pipe slightly corroded (3.6.B.2c) (3 times)
Offside Rear Brake pipe slightly corroded (3.6.B.2c) (3 times)
Nearside Front Brake pipe excessively corroded (3.6.B.2c) (2 times)
Offside Front Brake pipe excessively corroded (3.6.B.2c) (2 times)
Parking brake: parking brake efficiency only just met. It would appear that the braking system requires adjustment or repair. (3.7.C.1b) (2 times)
Exhaust has part of the system slightly deteriorated (7.1.1a) (2 times)
Nearside Front Macpherson strut has slight movement in the upper support bearing assembly (2.5.B.1b) (2 times)
Nearside Rear Brake pipe excessively corroded (3.6.B.2c) (2 times)
Offside Front Macpherson strut has slight movement in the upper support bearing assembly (2.5.B.1b) (2 times)
headlamp level sensors broken on suspension,headlamp aim ok at time of test (2 times)
Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits (8.2.1.2 (a)) (2 times)
Nearside Front outer cv boot worn (2 times)
Nearside Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i)) (2 times)
Nearside Rear Tyre worn close to the legal limit (4.1.E.1) (1 times)

Porsche 911 c4 pass rate by registration year

Year	Vehicles	Tests	Pass rate	Avg mileage
1999	1	26	69%	123,173

Porsche 911 c4 reliability FAQ

Across 1 Porsche 911 c4 vehicles in our MOT data, 69% pass the MOT (a 31% failure rate), with about 2.4 faults or advisories recorded per test.

The most frequently recorded Porsche 911 c4 MOT issues are: Offside Rear Tyre worn close to the legal limit (4.1.E.1); Nearside Rear Brake pipe slightly corroded (3.6.B.2c); Offside Rear Brake pipe slightly corroded (3.6.B.2c).

The typical Porsche 911 c4 in our data has covered around 123,173 miles.

Compare the Porsche 911 c4

See how the Porsche 911 c4 stacks up against other Porsche models on MOT reliability:

911 c4 vs 911 911 c4 vs Boxster 911 c4 vs Cayenne 911 c4 vs Macan

Check a specific Porsche 911 c4

Enter a registration to see that exact vehicle's full MOT history, advisories and recurring faults.

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