Porsche 911

Reliability, estimated running costs, and MOT data across 32 model years from 117,064 MOT tests in 2024.

Avg Pass Rate

92%

Total Tests

117,064

Highest Pass Rate

2019 (97%)

Years Covered

About the Porsche 911

The Porsche 911 was MOT tested 117,064 times in 2024 (DVSA data, retests included) across 32 model years (1990 to 2021), with an average pass rate of 92%. That's comfortably above the average of 82% across all models in our data. Our records list petrol and lpg versions.

Best and Worst Years

Of the years with at least 100 tests, the 2019 model has the highest pass rate at 97% from 7,188 tests. The 1998 model has the lowest at 85%. The 12 point gap means pass rates vary somewhat between years, but no year is dramatically different. Newer cars usually pass more often simply because they are younger.

Reliability Trend

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.

Mileage Across Years

The oldest model in our data (1990) averages 94,950 miles, while the newest (2021) averages 11,708 miles.

Estimated Running Costs

Fuel (Petrol, 2981cc)

£1,958

Road Tax

£200

MOT Test

£55

Predicted Repairs

£200

Total per year£2,413

Per month£201/mo

Based on 7,400 miles/year, average pump prices of 174.57p petrol and 199.33p diesel (GOV.UK weekly road fuel prices, week of 19 October 2026), and MOT pass rate data. Insurance not included.

Full 2021 details

How reliable is the Porsche 911?

vs average of all models+10% (82% avg)

vs Porsche brand average+0% (92% avg)

Best to worst year spread12 percentage points

Reliability trendImproving over years

Porsche 911 by Year

Click any year to see detailed running costs, reliability data, and comparisons with similar cars.

Year	Pass Rate	Tests	Avg Mileage
2021	100%	72	11,708 mi
2020	97%	2,366	17,049 mi
2019	97%	7,188	20,907 mi
2018	96%	7,623	18,989 mi
2017	97%	6,200	26,067 mi
2016	97%	5,524	28,111 mi
2015	97%	4,950	32,698 mi
2014	96%	4,806	32,843 mi
2013	96%	3,535	43,937 mi
2012	95%	4,253	50,959 mi
2011	95%	2,580	43,837 mi
2010	94%	3,656	49,709 mi
2009	92%	3,055	59,885 mi
2008	92%	4,216	58,132 mi
2007	90%	5,366	62,566 mi
2006	90%	6,184	70,206 mi
2005	90%	5,986	73,824 mi
2004	88%	5,191	74,425 mi
2003	87%	5,168	82,296 mi
2002	86%	4,972	84,310 mi
2001	88%	2,885	87,628 mi
2000	86%	2,099	90,453 mi
1999	87%	3,668	94,086 mi
1998	85%	3,337	99,008 mi
1997	90%	2,103	76,331 mi
1996	91%	2,651	80,487 mi
1995	89%	1,831	80,965 mi
1994	91%	1,473	95,559 mi
1993	91%	698	89,736 mi
1992	94%	611	81,375 mi
1991	91%	929	81,480 mi
1990	91%	1,888	94,950 mi

Questions about the Porsche 911

Is the Porsche 911 reliable?

Across its 32 model years in our data (1990 to 2021), the Porsche 911 averages a 92% MOT pass rate, from 117,064 tests (DVSA MOT data for tests in 2024, retests included). That's 10 points above the average of 82% across all models in the same data. The 2019 model has the highest pass rate of the years with at least 100 tests, at 97%.

Which year Porsche 911 has the best MOT pass rate?

Of the years with at least 100 tests, the 2019 Porsche 911 has the highest MOT pass rate at 97%, while the 1998 model has the lowest at 85%, a 12 point gap. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.