Is the 2017 PORSCHE 911 reliable?

Excellent reliability. Very few MOT failures. 97% of PORSCHE 911s from 2017 passed their MOT first time in 2026, based on 6,200 tests. That's 15 points above the national average of 82%.

How much does a 2017 PORSCHE 911 cost to run?

Estimated annual running cost is £2,042 (£170/month), including £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2017 PORSCHE 911?

The 2017 PORSCHE 911 has a 97% MOT pass rate based on 6,200 tests in 2026. This ranks 44 out of 579 cars from 2017.

Which year PORSCHE 911 is most reliable?

The 2021 PORSCHE 911 has the highest MOT pass rate at 100%. The least reliable year is 1998 at 85%.

PORSCHE 911 (2017)

Q: What is the average mileage for a 2017 PORSCHE 911?

The average mileage for a 2017 PORSCHE 911 is 26,067 miles, which is significantly below the expected 66,600 miles for a 9-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.

Running costs, reliability data, and common problems from 6,200 real MOT tests.

Annual Cost

£2,042

£170/month

MOT Pass Rate

97%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 35-50

3996cc Petrol

Great Choice

97% pass rate, £2042/year to run. 15 points above average.

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Petrol3996cc9 years old6,200 tests26k miles avg

Annual Running Costs

Fuel (Petrol, 3996cc)

~30 mpg

£1,592

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,042

Per month£170/mo

Per week£39/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

97% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 15 points above the national average of 82%. It also outperforms the PORSCHE brand average of 92%.

At 9 years old, 97% of PORSCHE 911s from 2017 passed their MOT first time in 2026. That's based on 6,200 tests across the UK. The average mileage at this age is 26,067 miles.

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How Does It Compare?

Rank among 2017 cars44th of 579(top 8%)

Rank among PORSCHE models44th of 276(top 16%)

vs national average+15%(82% avg)

vs 2017 cars average+10%(87% avg)

vs PORSCHE average+5%(92% avg)

Mileage Analysis

26,067

Average miles

66,600

Expected for age

The average 2017 PORSCHE 911 has 26,067 miles on the clock, which is significantly below the expected 66,600 miles for a 9-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.

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Best Year to Buy?

The most reliable year is the 2021 model with a 100% MOT pass rate, while the 1998 model has the lowest at 85%. The 2017 sits between the two at 97%.

PORSCHE 911 by Year

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

Similar Cars to Consider

MERCEDES C

2016 · 3982cc Petrol

£2,247/year

88%

-9%

AUDI A6

2016 · 3993cc Petrol

£2,247/year

89%

-8%

PORSCHE MACAN

2015 · 3604cc Petrol

£2,097/year

91%

-6%

VOLKSWAGEN TOUAREG

2015 · 3600cc Petrol

£2,247/year

85%

-12%

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About the 2017 PORSCHE 911

The 2017 PORSCHE 911 is a luxury with a 3996cc petrol engine. 6,200 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. It ranks in the top 8% of all 2017 cars for reliability.

With an average of 26,067 miles at 9 years old, PORSCHE 911 owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.

2017 PORSCHE 911 Fuel Costs

The 3996cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).

What does it cost to own a 2017 PORSCHE 911?

Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 97% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

PORSCHE 911 Reliability Trend

Newer PORSCHE 911s show better MOT pass rates than older ones, with an average improvement of 6 percentage points.

Buying a Used 2017 PORSCHE 911

At 9 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2021 model has the highest pass rate at 100%. With 6,200 MOT tests in our data, there's strong statistical confidence in these figures.

Common Issues to Watch For

Based on the 2017 PORSCHE 911's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 9 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.

Oil Consumption

Medium risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2017 PORSCHE 911 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
PORSCHE 911(2017)	97%	£1592	£195	Grp 35-50	£2042
MERCEDES C(2016)	88%	£1592	£250	Grp 35-50	£2247+£205
AUDI A6(2016)	89%	£1592	£250	Grp 35-50	£2247+£205
PORSCHE MACAN(2015)	91%	£1592	£250	Grp 35-50	£2097+£55
VOLKSWAGEN TOUAREG(2015)	85%	£1592	£250	Grp 35-50	£2247+£205

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.