Is the 2021 AUDI A6 reliable?

Excellent reliability. Very few MOT failures. 93% of AUDI A6s from 2021 passed their MOT first time in 2026, based on 2,105 tests. That's 11 points above the national average of 82%.

How much does a 2021 AUDI A6 cost to run?

Estimated annual running cost is £1,777 (£148/month), including £1327 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2021 AUDI A6?

The 2021 AUDI A6 has a 93% MOT pass rate based on 2,105 tests in 2026. This ranks 1490 out of 3373 cars from 2021.

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 2021 AUDI A6?

The average mileage for a 2021 AUDI A6 is 36,146 miles, which is in line with the expected 37,000 miles for a 5-year-old car, suggesting normal everyday use.

AUDI A6 (2021)

Running costs, reliability data, and common problems from 2,105 real MOT tests.

Annual Cost

£1,777

£148/month

MOT Pass Rate

93%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 18-32

1984cc Petrol

Great Choice

93% pass rate, £1777/year to run. 11 points above average.

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Petrol1984cc5 years old2,105 tests36k miles avg

Annual Running Costs

Fuel (Petrol, 1984cc)

~36 mpg

£1,327

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,777

Per month£148/mo

Per week£34/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

93% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 11 points above the national average of 82%.

At 5 years old, 93% of AUDI A6s from 2021 passed their MOT first time in 2026. That's based on 2,105 tests across the UK. The average mileage at this age is 36,146 miles.

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How Does It Compare?

Rank among 2021 cars1490th of 3,373(top 44%)

Rank among AUDI models416th of 1,079(top 39%)

vs national average+11%(82% avg)

vs 2021 cars average+1%(92% avg)

vs AUDI average+3%(90% avg)

Mileage Analysis

36,146

Average miles

37,000

Expected for age

The average 2021 AUDI A6 has 36,146 miles on the clock, which is in line with the expected 37,000 miles for a 5-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2020 model with a 94% MOT pass rate, while the 1997 model has the lowest at 71%. The 2021 sits between the two at 93%.

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

VOLKSWAGEN GOLF

2019 · 1498cc Petrol

£1,582/year

92%

-1%

NISSAN QASHQAI

2020 · 1598cc Petrol

£1,582/year

93%

same

MINI COOPER

2019 · 1499cc Petrol

£1,582/year

92%

-1%

HYUNDAI TUCSON

2019 · 1591cc Petrol

£1,582/year

90%

-3%

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About the 2021 AUDI A6

The 2021 AUDI A6 is a premium with a 1984cc petrol engine. 2,105 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2021, the average MOT pass rate is 92%, and this model beats that benchmark.

With an average of 36,146 miles at 5 years old, AUDI A6 owners drive about as much as the UK average.

2021 AUDI A6 Fuel Costs

The 1984cc petrol engine offers a reasonable balance between performance and economy. Expect around 36 mpg in mixed driving, which works out to roughly £1,327 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).

What does it cost to own a 2021 AUDI A6?

Total estimated annual running cost is £1,777 (£148/month), broken down as £1327 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 93% 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 2021 AUDI A6

At 5 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. If you're flexible on year, the 2020 model has the highest pass rate at 94%.

Common Issues to Watch For

Based on the 2021 AUDI A6's fuel type, age, and engine size, these are the most likely problem areas to check.

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 2021 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(2021)	93%	£1327	£195	Grp 18-32	£1777
VOLKSWAGEN GOLF(2019)	92%	£1137	£190	Grp 12-25	£1582-£195
NISSAN QASHQAI(2020)	93%	£1137	£190	Grp 12-25	£1582-£195
MINI COOPER(2019)	92%	£1137	£190	Grp 12-25	£1582-£195
HYUNDAI TUCSON(2019)	90%	£1137	£190	Grp 12-25	£1582-£195

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.