HYMER B (2021)
Running costs, reliability data, and common problems from 48 real MOT tests.
Annual Cost
£1,845
£154/month
MOT Pass Rate
85%
Good
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2143cc Diesel
Solid Option
85% pass rate, £1845/year to run. Close to the national average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
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
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the HYMER brand average of 91%.
At 5 years old, 85% of HYMER Bs from 2021 passed their MOT first time in 2026. That's based on 48 tests across the UK. The average mileage at this age is 12,347 miles.
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How Does It Compare?
Mileage Analysis
12,347
Average miles
37,000
Expected for age
The average 2021 HYMER B has 12,347 miles on the clock, which is significantly below the expected 37,000 miles for a 5-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 2015 model with a 95% MOT pass rate, while the 2019 model has the lowest at 88%. The 2021 sits between the two at 85%.
HYMER B by Year
Similar Cars to Consider
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About the 2021 HYMER B
The 2021 HYMER B is a family car with a 2143cc diesel engine. 48 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 93% of 2021 cars for MOT pass rates.
With an average of 12,347 miles at 5 years old, HYMER B 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.
2021 HYMER B Fuel Costs
The 2143cc 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 HYMER B?
Total estimated annual running cost is £1,845 (£154/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 85% pass rate. Keeping on top of servicing will help avoid surprises.
HYMER B Reliability Trend
The HYMER B has maintained consistent MOT pass rates across model years, varying by only 2 percentage points.
Buying a Used 2021 HYMER B
At 5 years old, the HYMER B 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 2015 model has the highest pass rate at 95%. Note: with only 48 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2021 HYMER B'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 HYMER B stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| HYMER B(2021) | 85% | £1245 | £195 | Grp 25-38 | £1845 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£363 |
| FORD TRANSIT CUSTOM(2019) | 87% | £1037 | £190 | Grp 18-32 | £1632-£213 |
| BMW 118(2020) | 93% | £1037 | £190 | Grp 18-32 | £1482-£363 |
| VOLKSWAGEN T-ROC(2019) | 94% | £1037 | £190 | Grp 18-32 | £1482-£363 |
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.
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