Mercedes-Benz GLC vs BMW X3: Compare by Reg (2026)
Side-by-side comparison of the Mercedes-Benz GLC and BMW X3, covering MOT pass rates, estimated running costs, typical issues, and overall reliability. Based on 336,081 MOT tests (DVSA MOT data for tests in 2024, retests included).
Comparing specific cars? Enter both reg plates
This page shows model-level MOT data. For the exact Mercedes-Benz GLC and BMW X3 you are viewing, enter a reg plate below for its MOT history, mileage checks and running costs.
Check a Mercedes-Benz GLC
Check a BMW X3
Comparing two cars side by side? Use the free reg comparison tool →
Quick Verdict
The Mercedes-Benz GLC edges ahead in this comparison with a 91% MOT pass rate versus 87% for the BMW X3. The difference is modest, so both are reasonable choices. The Mercedes-Benz GLC has a slight advantage on MOT results, while the BMW X3 may offer other benefits depending on your priorities.
Mercedes-Benz GLC
91%
MOT pass rate
139,021 tests
More reliableBMW X3
87%
MOT pass rate
197,060 tests
Full Comparison: Mercedes-Benz GLC vs BMW X3
| Category | Mercedes-Benz GLC | BMW X3 |
|---|---|---|
| MOT Pass Rate | 91%Winner | 87% |
| MOT Fail Rate | 9%Winner | 13% |
| vs All-Model Avg | +9 ptsWinner | +5 pts |
| Est. Fuel Cost (petrol, 8,000 mi/yr) | £2,267 | £2,267 |
| Est. Insurance Group | 30-42 | 30-42 |
| Est. Depreciation/yr | £3,000-£5,000 | £2,000-£3,500 |
| Engine Size | 2.9L | 2.5L |
| Fuel Type(s) | Diesel, Petrol | Diesel, Petrol |
| Segment | Premium performance | Premium |
| Avg Mileage | 49,410 miWinner | 91,817 mi |
| MOT Tests Analysed | 139,021 | 197,060 |
| Model Years | 8 years | 18 years |
| Best Year | 2021 (95%)Winner | 2021 (94%) |
| Worst Year | 2015 (89%)Winner | 2005 (76%) |
| Reliability Trend | Improving | Improving |
Pass rates are the share of MOT tests that ended in a pass (DVSA MOT data for tests in 2024, retests included), across all years of each model. Best and worst years need at least 100 tests. Fuel cost, insurance group and depreciation are our rough estimates from engine size and make, not official figures.
Common Problems Comparison
Typical issues to check on cars of this type and age, not faults measured for these models.
Mercedes-Benz GLC: Typical Issues to Check
- •DPF and emissions issues (diesel models)
- •Higher tyre and brake wear (larger engine)
- •Suspension wear on older models
- •Lighting defects (common on all cars)
BMW X3: Typical Issues to Check
- •DPF and emissions issues (diesel models)
- •Higher tyre and brake wear (larger engine)
- •Suspension wear on older models
- •Lighting defects (common on all cars)
Check a Specific Mercedes-Benz GLC
Enter a reg plate to see the exact MOT history and running costs for a specific Mercedes-Benz GLC.
Check a Specific BMW X3
Enter a reg plate to see the exact MOT history and running costs for a specific BMW X3.
Car history check for £4.99
Finance, stolen and write-off checks
Outstanding finance with the lender's details, stolen, write-off and keeper changes. One payment, no subscription.
Comparing checks first? See the cheapest car check in the UK and the best car check providers compared.
Mercedes-Benz GLC vs BMW X3 FAQ
Can I compare a Mercedes-Benz GLC and BMW X3 by registration plate?
Yes. Enter each car's UK registration plate on this page or use our free compare tool at carcostcheck.co.uk/compare to see MOT history, mileage, health scores and running costs for the exact vehicles you are considering, not just model averages.
Which is more reliable, the Mercedes-Benz GLC or BMW X3?
The Mercedes-Benz GLC has the higher MOT pass rate, 91% compared to 87% for the BMW X3 (DVSA MOT data for tests in 2024, retests included).
Which is cheaper to run, the Mercedes-Benz GLC or BMW X3?
At 8,000 miles per year, the Mercedes-Benz GLC costs around £2,267 in fuel, while the BMW X3 costs around £2,267 (our estimates for petrol versions from average engine size, with fuel at GOV.UK average pump prices for the week of 19 October 2026). On these estimates they cost the same in fuel. Insurance, depreciation, and repair costs also factor into total running costs.
Should I buy a Mercedes-Benz GLC or BMW X3?
The Mercedes-Benz GLC edges ahead in this comparison with a 91% MOT pass rate versus 87% for the BMW X3. The difference is modest, so both are reasonable choices. The Mercedes-Benz GLC has a slight advantage on MOT results, while the BMW X3 may offer other benefits depending on your priorities.
Mercedes-Benz GLC Running Costs
Full breakdown of annual costs, reliability, and MOT data
BMW X3 Running Costs
Full breakdown of annual costs, reliability, and MOT data
Compare Different Cars
Want to compare different cars? Enter any two reg plates for a personalised side-by-side comparison.
Compare Any Two Cars