Hymer B (2021)
Estimated running costs and MOT pass rates from 48 MOT tests in 2024.
Annual Cost
£2,281
£190/month
MOT Pass Rate
85%
Good
Road Tax
£200
Standard rate/year
Est. Insurance
n/a
2143cc Diesel
Solid Option
85% pass rate, £2,281/year to run. Close to the average across all models.
Check a specific Hymer B
Enter a reg plate for full MOT history, mileage check, health score, running costs, and reliability data. Free, instant, no signup.
Annual Running Costs
~40 mpg
Car rate estimate; motorhomes are taxed differently
Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).
Reliability Verdict
Good reliability. Occasional issues but generally solid. That's close to the average of 82% across all models in our data. It falls below the Hymer brand average of 91%.
85% of MOT tests on Hymer Bs from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 48 tests across the UK, retests included. The average mileage recorded at those tests was 12,347 miles.
Got a Hymer B you're looking at?
Enter the reg plate to check its specific MOT history, mileage, and health score.
How Does It Compare?
Mileage Analysis
12,347
Average miles
22,200
Expected for age
The average 2021 Hymer B had 12,347 miles on the clock at its 2024 MOT, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Looking at a specific Hymer B?
Enter its reg plate for a free check with full MOT history, mileage verification, and predicted costs.
Best Year to Buy?
Of the years with at least 100 tests, the 2015 model has the highest MOT pass rate at 95%, while the 2019 model has the lowest at 88%. The 2021 scores 85%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.
Hymer B by Year
Similar Cars to Consider
Check a Specific Hymer B
Enter a reg plate to get the full MOT history, health score, and mileage verification.
Upgrade to Premium (£4.99) for stolen, finance, and write-off checks.
About the 2021 Hymer B
The 2021 Hymer B is a motorhome. Our records list a 2143cc diesel engine, though engines vary between versions. 48 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 7% of 2021 models for MOT pass rate.
With an average of 12,347 miles recorded at its 2024 MOT tests, Hymer B owners tend to use this car less than the typical driver.
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 £1,676 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; 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 £2,281 (£190/month), broken down as £1,676 fuel, £200 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 3 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
These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.
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 estimated annual running costs, insurance group, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Est. Ins. Group | Total/yr |
|---|---|---|---|---|---|
| Hymer B(2021) | 85% | £1,676 | £200 | n/a | £2,281 |
| Ford Transit Custom(2019) | 87% | £1,397 | £200 | n/a | £2,002-£279 |
| Volkswagen Transporter(2019) | 88% | £1,397 | £200 | n/a | £2,002-£279 |
Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.
Questions about the 2021 Hymer B
Is the 2021 Hymer B reliable?
Good reliability. Occasional issues but generally solid. 85% of MOT tests on 2021 Hymer Bs ended in a pass, from 48 tests (DVSA MOT data for tests in 2024, retests included). That's 3 points above the average of 82% across all models in the same data.
How much does a 2021 Hymer B cost to run?
Our estimate is £2,281 a year (£190 a month): £1,676 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.
What is the MOT pass rate for a 2021 Hymer B?
85% of 48 MOT tests on the 2021 Hymer B ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 3107th of 3,336 models first registered in 2021 (bottom 7%).
Which year Hymer B has the best MOT pass rate?
Of the years with at least 100 tests, the 2015 Hymer B has the highest MOT pass rate at 95% and the 2019 the lowest at 88%. Newer cars usually pass more often simply because they are younger and have done fewer miles.
What is the average mileage for a 2021 Hymer B?
The average mileage recorded at MOT tests on the 2021 Hymer B is 12,347 miles, which is below the expected 22,200 miles for a 3-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Related Hymer Models
Explore other Hymer cars or similar models in the same category.
Related Guides
In-depth articles relevant to the Hymer B.
Petrol vs Diesel in 2026: Which Actually Costs Less to Own?
8 min read
Running CostsCheapest Cars to Run in 2026: Running Costs From DVSA MOT Data
9 min read
Reliability20 Most Reliable Used Cars UK 2026: Real MOT Pass Rate Rankings
10 min read
Buying GuideFord Fiesta Common Problems (2026): What to Check Before Buying
13 min read
ReliabilityFord Puma Common Problems: 7 Issues That Could Cost £1,500+ (2026)
13 min read
Check a specific Hymer B
Enter the reg to see its MOT history, mileage check, and predicted costs.
Premium History Check
Buying a Hymer B? Our premium check covers:
- Stolen check (PNC)
- Outstanding finance
- Write-off history (Cat A/B/N/S)
- Previous owners count
With outstanding finance included