CITROEN RELAY 35 HVY L4H3 ENT BHDI SS (2021)
Running costs, reliability data, and common problems from 50 real MOT tests.
Annual Cost
£1,695
£141/month
MOT Pass Rate
94%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2200cc Diesel
Great Choice
94% pass rate, £1695/year to run. 12 points above average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
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
Excellent reliability. Very few MOT failures. That's 12 points above the national average of 82%. It also outperforms the CITROEN brand average of 79%.
At 5 years old, 94% of CITROEN RELAY 35 HVY L4H3 ENT BHDI SSs from 2021 passed their MOT first time in 2026. That's based on 50 tests across the UK. The average mileage at this age is 21,594 miles.
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How Does It Compare?
Mileage Analysis
21,594
Average miles
37,000
Expected for age
The average 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS has 21,594 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 RELAY 35 HVY L4H3 ENT BHDI SS by Year
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About the 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS
The 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS is a family car with a 2200cc diesel engine. 50 of these vehicles were MOT tested in 2026, making it a rare model 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 21,594 miles at 5 years old, CITROEN RELAY 35 HVY L4H3 ENT BHDI SS owners tend to use this car less than the typical driver.
2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS Fuel Costs
The 2200cc diesel engine offers a reasonable balance between performance and economy. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS?
Total estimated annual running cost is £1,695 (£141/month), broken down as £1245 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.
Buying a Used 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS
At 5 years old, the CITROEN RELAY 35 HVY L4H3 ENT BHDI SS offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 50 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 CITROEN RELAY 35 HVY L4H3 ENT BHDI SS's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Medium riskDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
EGR Valve
Low riskExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Dual Mass Flywheel
Medium riskLarger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.
Service History
Low riskAlways 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 RELAY 35 HVY L4H3 ENT BHDI SS stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| CITROEN RELAY 35 HVY L4H3 ENT BHDI SS(2021) | 94% | £1245 | £195 | Grp 25-38 | £1695 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£213 |
| FORD TRANSIT CUSTOM(2019) | 87% | £1037 | £190 | Grp 18-32 | £1632-£63 |
| BMW 118(2020) | 93% | £1037 | £190 | Grp 18-32 | £1482-£213 |
| VOLKSWAGEN T-ROC(2019) | 94% | £1037 | £190 | Grp 18-32 | £1482-£213 |
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.
Related Citroen Models
Explore other Citroen cars or similar models in the same category.
CITROEN C4
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CITROEN DS3
2014 · 1560cc Diesel
CITROEN C3
2010 · 1398cc Diesel
FORD KUGA
2019 · 1997cc Diesel
FORD TRANSIT CUSTOM
2019 · 2000cc Diesel
BMW 118
2020 · 1995cc Diesel
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