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, running costs, common faults, and overall reliability. Based on 336,081 real MOT tests.
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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 reliability advantage, 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 National Avg | +9 ptsWinner | +5 pts |
| Est. Fuel Cost (8,000 mi/yr) | £1,792 | £1,792 |
| Insurance Group | 22-32 | 30-42 |
| Est. Depreciation/yr | £1,500-£3,000 | £2,000-£3,500 |
| Engine Size | 2.9L | 2.5L |
| Fuel Type(s) | Petrol, Diesel | Petrol, Diesel |
| Segment | Large car | Premium |
| Avg Mileage | 49,410 miWinner | 91,817 mi |
| MOT Tests Analysed | 139,021 | 197,060 |
| Model Years | 8 years | 18 years |
| Best Year | 2022 (96%)Winner | 2021 (94%) |
| Worst Year | 2015 (89%)Winner | 2005 (76%) |
| Reliability Trend | Improving | Improving |
Common Problems Comparison
Mercedes-Benz GLC Known Issues
- •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 Known Issues
- •DPF and emissions issues (diesel models)
- •Higher tyre and brake wear (larger engine)
- •Suspension wear on older models
- •Lighting defects (common on all cars)
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Mercedes-Benz GLC vs Bmw X3 FAQ
Which is more reliable, the Mercedes-Benz GLC or Bmw X3?
Based on MOT data, the Mercedes-Benz GLC is more reliable with a 91% pass rate, compared to 87% for the Bmw X3.
Which is cheaper to run?
At 8,000 miles per year, the Mercedes-Benz GLC costs around £1,792 in fuel, while the Bmw X3 costs around £1,792. The Mercedes-Benz GLC is cheaper on 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 reliability advantage, 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
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