Is the 2021 CITROEN C4 reliable?

Excellent reliability. Very few MOT failures. 90% of CITROEN C4s from 2021 passed their MOT first time in 2026, based on 416 tests. That's 8 points above the national average of 82%.

How much does a 2021 CITROEN C4 cost to run?

Estimated annual running cost is £1,405 (£117/month), including £955 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2021 CITROEN C4?

The 2021 CITROEN C4 has a 90% MOT pass rate based on 416 tests in 2026. This ranks 2533 out of 3373 cars from 2021.

Which year CITROEN C4 is most reliable?

The 2021 CITROEN C4 has the highest MOT pass rate at 90%. The least reliable year is 2004 at 62%.

CITROEN C4 (2021)

Q: What is the average mileage for a 2021 CITROEN C4?

The average mileage for a 2021 CITROEN C4 is 20,749 miles, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 416 real MOT tests.

Annual Cost

£1,405

£117/month

MOT Pass Rate

90%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 5-15

1200cc Petrol

Great Choice

90% pass rate, £1405/year to run. 8 points above average.

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Petrol1200cc5 years old416 tests21k miles avg

Annual Running Costs

Fuel (Petrol, 1200cc)

~50 mpg

£955

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,405

Per month£117/mo

Per week£27/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

90% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 8 points above the national average of 82%. It also outperforms the CITROEN brand average of 79%.

At 5 years old, 90% of CITROEN C4s from 2021 passed their MOT first time in 2026. That's based on 416 tests across the UK. The average mileage at this age is 20,749 miles.

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How Does It Compare?

Rank among 2021 cars2533th of 3,373(top 75%)

Rank among CITROEN models110th of 599(top 18%)

vs national average+8%(82% avg)

vs 2021 cars average-2%(92% avg)

vs CITROEN average+11%(79% avg)

Mileage Analysis

20,749

Average miles

37,000

Expected for age

The average 2021 CITROEN C4 has 20,749 miles on the clock, which is below the expected 37,000 miles for a 5-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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CITROEN C4 by Year

Year	Pass Rate	Tests	Avg Mileage
2021	90%	416	20,749 mi
2020	88%	252	27,130 mi
2019	86%	7,946	40,283 mi
2018	85%	4,459	50,626 mi
2017	84%	1,606	77,091 mi
2016	79%	30,587	70,374 mi
2015	77%	49,480	77,210 mi
2014	74%	38,709	85,376 mi
2013	73%	22,649	89,088 mi
2012	73%	15,587	96,404 mi
2011	72%	13,467	102,574 mi
2010	70%	12,669	106,070 mi
2009	69%	10,408	105,085 mi
2008	67%	15,127	108,072 mi
2007	69%	11,300	106,424 mi
2006	69%	3,634	94,973 mi
2005	72%	1,804	98,899 mi
2004	62%	69	103,511 mi

Similar Cars to Consider

FORD FIESTA

2019 · 998cc Petrol

£1,400/year

91%

+1%

VOLKSWAGEN GOLF

2019 · 1498cc Petrol

£1,582/year

92%

+2%

VAUXHALL CORSA

2019 · 1398cc Petrol

£1,732/year

88%

-2%

NISSAN QASHQAI

2020 · 1598cc Petrol

£1,582/year

93%

+3%

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About the 2021 CITROEN C4

The 2021 CITROEN C4 is a city car with a 1200cc petrol engine. 416 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. Among all cars from 2021, the average MOT pass rate is 92%, and this model falls short of that benchmark.

With an average of 20,749 miles at 5 years old, CITROEN C4 owners tend to use this car less than the typical driver.

2021 CITROEN C4 Fuel Costs

The modest 1200cc petrol engine keeps fuel costs low, which is a real advantage for a city car. Expect around 50 mpg in mixed driving, which works out to roughly £955 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 CITROEN C4?

Total estimated annual running cost is £1,405 (£117/month), broken down as £955 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 90% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

CITROEN C4 Reliability Trend

Newer CITROEN C4s show better MOT pass rates than older ones, with an average improvement of 13 percentage points.

Buying a Used 2021 CITROEN C4

At 5 years old, the CITROEN C4 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 2021 CITROEN C4's fuel type, age, and engine size, these are the most likely problem areas to check.

Coil Pack Failure

Medium risk

Smaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.

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 CITROEN C4 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
CITROEN C4(2021)	90%	£955	£195	Grp 5-15	£1405
FORD FIESTA(2019)	91%	£955	£190	Grp 1-8	£1400-£5
VOLKSWAGEN GOLF(2019)	92%	£1137	£190	Grp 12-25	£1582+£177
VAUXHALL CORSA(2019)	88%	£1137	£190	Grp 8-20	£1732+£327
NISSAN QASHQAI(2020)	93%	£1137	£190	Grp 12-25	£1582+£177

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.