Is the 2020 AUDI A6 reliable?

Excellent reliability. Very few MOT failures. 94% of AUDI A6s from 2020 passed their MOT first time in 2026, based on 3,470 tests. That's 12 points above the national average of 82%.

How much does a 2020 AUDI A6 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 2020 AUDI A6?

The 2020 AUDI A6 has a 94% MOT pass rate based on 3,470 tests in 2026. This ranks 665 out of 2596 cars from 2020.

Which year AUDI A6 is most reliable?

The 2020 AUDI A6 has the highest MOT pass rate at 94%. The least reliable year is 1997 at 71%.

What is the average mileage for a 2020 AUDI A6?

The average mileage for a 2020 AUDI A6 is 42,761 miles, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.

AUDI A6 (2020)

Running costs, reliability data, and common problems from 3,470 real MOT tests.

Annual Cost

£2,042

£170/month

MOT Pass Rate

94%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 35-50

3996cc Petrol

Great Choice

94% pass rate, £2042/year to run. 12 points above average.

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Petrol3996cc6 years old3,470 tests43k 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

94% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the AUDI brand average of 90%.

At 6 years old, 94% of AUDI A6s from 2020 passed their MOT first time in 2026. That's based on 3,470 tests across the UK. The average mileage at this age is 42,761 miles.

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How Does It Compare?

Rank among 2020 cars665th of 2,596(top 26%)

Rank among AUDI models293th of 1,079(top 27%)

vs national average+12%(82% avg)

vs 2020 cars average+2%(92% avg)

vs AUDI average+4%(90% avg)

Mileage Analysis

42,761

Average miles

44,400

Expected for age

The average 2020 AUDI A6 has 42,761 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.

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AUDI A6 by Year

Year	Pass Rate	Tests	Avg Mileage
2021	93%	2,105	36,146 mi
2020	94%	3,470	42,761 mi
2019	92%	16,657	54,594 mi
2018	92%	16,546	62,634 mi
2017	91%	19,296	75,408 mi
2016	89%	26,437	85,249 mi
2015	89%	22,966	96,950 mi
2014	88%	21,808	106,355 mi
2013	87%	20,882	115,551 mi
2012	86%	16,143	125,550 mi
2011	82%	13,126	135,985 mi
2010	81%	12,471	143,668 mi
2009	81%	8,341	150,654 mi
2008	80%	11,124	156,627 mi
2007	79%	10,782	162,839 mi
2006	78%	6,542	165,663 mi
2005	78%	3,534	163,283 mi
2004	75%	2,156	155,383 mi
2003	74%	1,408	153,657 mi
2002	73%	771	164,916 mi
2001	78%	356	157,216 mi
2000	75%	389	150,802 mi
1999	73%	410	157,368 mi
1998	76%	222	151,701 mi
1997	71%	215	176,094 mi
1996	78%	316	189,126 mi
1995	76%	136	162,842 mi
1994	81%	53	140,857 mi

Similar Cars to Consider

MERCEDES C

2019 · 3982cc Petrol

£2,037/year

91%

-3%

PORSCHE CAYENNE

2019 · 3996cc Petrol

£2,037/year

95%

+1%

PORSCHE 911

2018 · 3996cc Petrol

£2,037/year

96%

+2%

BENTLEY CONTINENTAL GT

2019 · 3996cc Petrol

£2,037/year

97%

+3%

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About the 2020 AUDI A6

The 2020 AUDI A6 is a premium performance with a 3996cc petrol engine. 3,470 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2020, the average MOT pass rate is 92%, and this model beats that benchmark.

With an average of 42,761 miles at 6 years old, AUDI A6 owners drive about as much as the UK average.

2020 AUDI A6 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 2020 AUDI A6?

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 94% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

AUDI A6 Reliability Trend

Newer AUDI A6s show better MOT pass rates than older ones, with an average improvement of 11 percentage points.

Buying a Used 2020 AUDI A6

At 6 years old, the AUDI A6 offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.

Common Issues to Watch For

Based on the 2020 AUDI A6's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 6 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

Low risk

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

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 2020 AUDI A6 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
AUDI A6(2020)	94%	£1592	£195	Grp 35-50	£2042
MERCEDES C(2019)	91%	£1592	£190	Grp 35-50	£2037-£5
PORSCHE CAYENNE(2019)	95%	£1592	£190	Grp 35-50	£2037-£5
PORSCHE 911(2018)	96%	£1592	£190	Grp 35-50	£2037-£5
BENTLEY CONTINENTAL GT(2019)	97%	£1592	£190	Grp 35-50	£2037-£5

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.