Porsche 911 reliability, MOT pass rate and rarity

Time Period & Model

Time period snapshot: Last 5 years

Manufacturer: Porsche

Model: 911

Model reliability rank

MOT-based rank from 266,693 selected-period tests.

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Overall MOT pass rate

88.7%

Share of this model's 266,693 selected-period MOT tests that pass.

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Efficiency, emissions & tax

Average MPG

28.8 mpg

CO2 emission

230 g/km

Euro emissions

Euro 6

Tax cost

£330/yr

Vehicle list price over £40,000?NoYes

Average vehicle miles

64,005

Lower average mileage in the analysed fleet.

Life expectancy miles

70,177

Lower mature-fleet mileage expectation.

Average vehicle age

19.9

Older average age in the represented fleet.

Vehicles represented

43,618

43,615 valid MOT, 3 under 3 years.

Tests analysed

266,693

266,693 MOT tests in the selected period.

Rarity ranking

Based on Make & Model

Scarce

43,618On the road

Insight summary

Porsche 911 is a scarce model in this snapshot, with 43,618 represented vehicles and 0.10% of the active UK pool tracked by AutoRank. For the last 5 years, it has a pass rate of 88.7% from 266,693 MOT tests, with a reliability score of 80. The current pool shows an average of 64,005 miles and an average age of 19.9 years, while mature-fleet mileage is estimated at 70,177 miles. Petrol leads the fuel split, followed by lpg, and the most frequent defect themes are exhaust emissions, windscreen damage and lighting. The practical read is that the Porsche 911 looks convincing in this view, especially where normal wear items have been kept on top of.

Fuel type breakdown (by model)

Fuel	Vehicles
PETROL	43,531
LPG	60
ELECTRIC	15
OTHER	6
DIESEL	4
GAS	1
GAS BI-FUEL	1

Euro NCAP Safety

No NCAP tests found for this model.

Top 25 most common defects (by model)

Defect	Count
Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))	2,622
Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))	2,562
Nearside Headlamp aim too high (4.1.2 (a))	1,067
Offside Front Position lamp not working (4.2.1 (a) (ii))	1,046
Offside Headlamp aim too high (4.1.2 (a))	1,046
Nearside Front Position lamp not working (4.2.1 (a) (ii))	1,029
Offside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))	915
Nearside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))	900
Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))	812
Parking brake efficiency below requirements (1.4.2 (a) (i))	756
Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))	700
Nearside Rear Tyre has ply or cords exposed (5.2.3 (d) (ii))	689
Rear fog lamp not working (4.5.1 (a) (ii))	685
Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))	674
Front Registration plate does not conform to the specified requirements (0.1 (d))	657
Windscreen washer not working (3.5 (a))	621
Offside Front Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i))	596
Rear Registration plate does not conform to the specified requirements (0.1 (d))	551
Nearside Front Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i))	548
Nearside Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))	544
Offside Front Headlamp aim too high (4.1.2 (a))	537
Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))	528
Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))	525
Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits (8.2.1.2 (a))	516
Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))	512

All 25 defects ranked by recorded countShowing 21,638 defects across this top 25 set

Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))

2,622

Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))

2,562

Nearside Headlamp aim too high (4.1.2 (a))

1,067

Offside Front Position lamp not working (4.2.1 (a) (ii))

1,046

Offside Headlamp aim too high (4.1.2 (a))

1,046

Nearside Front Position lamp not working (4.2.1 (a) (ii))

1,029

Offside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

915

Nearside Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

900

Nearside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))

812

Parking brake efficiency below requirements (1.4.2 (a) (i))

756

Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))

700

Nearside Rear Tyre has ply or cords exposed (5.2.3 (d) (ii))

689

Rear fog lamp not working (4.5.1 (a) (ii))

685

Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii))

674

Front Registration plate does not conform to the specified requirements (0.1 (d))

657

Windscreen washer not working (3.5 (a))

621

Offside Front Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i))

596

Rear Registration plate does not conform to the specified requirements (0.1 (d))

551

Nearside Front Outer Drive shaft joint constant velocity boot severely deteriorated (6.1.7 (g) (i))

548

Nearside Rear Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))

544

Offside Front Headlamp aim too high (4.1.2 (a))

537

Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))

528

Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))

525

Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturer's specified limits (8.2.1.2 (a))

516

Offside Rear Tyre tread depth below requirements of 1.6mm (5.2.3 (e))

512

Porsche 911 reliability and MOT data