MG ZR MOT pass rate and common failures
Of 1,786 class-4 normal initial MOT tests in 2024, 63.7% passed without an initial fail or PRS repair — below the 71.2% UK average.
Checking a MG ZR?
Model-level statistics cannot reveal the condition or provenance of one car.
Check its registration free for the actual MOT, tax and mileage record. Before buying, the optional £9.99 full history check adds outstanding-finance, stolen and insurance write-off checks.
Pass rate by vehicle age
| Age | Tests | Initial pass rate |
|---|---|---|
| 15–30 years | 1,785 | 63.7% |
Common initial failure categories
These are the items that most often caused a MG ZR to fail its first test, with what each one usually means for a buyer.
- Exhaust Emissions — 9% of tests. The car exceeded its emissions limits. Can be a sensor or a service, but on a diesel it can also mean an expensive filter or catalyst.
- Brake Performance — 7.9% of tests. The brakes underperformed on the rolling road. Expect brake work rather than an adjustment.
- Transmission — 6.4% of tests. A fault with a driveshaft, gaiter or transmission component. Costs vary widely.
- Component Mounting Prescribed Areas — 6.3% of tests. Corrosion near a mounting point for a tested component. This is the kind of rust that gets expensive — inspect it.
- Headlamp Aim — 6.3% of tests. Headlights pointing too high or low. Cheap to adjust, and common on every make.
- Exhaust System — 4% of tests. A leaking or insecure exhaust.
What this does and does not tell you
A pass rate describes how a population of cars behaved on test day. It says nothing about how one car was driven, serviced or repaired, and an MOT does not cover the engine, clutch or gearbox at all.
Use it to know what to look for: if tyres and brakes dominate the list, price those in; if corrosion or suspension appears, get underneath the car. Then check the individual vehicle — its MOT history shows whether these same items have been advised year after year, and its mileage record shows whether the reading is consistent.
How many MG ZR are left?
At the end of 2026 Q1, DfT recorded 1,338 licensed and 5,660 SORN vehicles in the MG ZR generic-model group.
Licensed and SORN trend for the MG ZR
Before you buy
- Exhaust Emissions — 9% of tests in 2024. The car exceeded its emissions limits. Can be a sensor or a service, but on a diesel it can also mean an expensive filter or catalyst.
- Brake Performance — 7.9% of tests in 2024. The brakes underperformed on the rolling road. Expect brake work rather than an adjustment.
- Transmission — 6.4% of tests in 2024. A fault with a driveshaft, gaiter or transmission component. Costs vary widely.
- Component Mounting Prescribed Areas — 6.3% of tests in 2024. Corrosion near a mounting point for a tested component. This is the kind of rust that gets expensive — inspect it.
- Budget for a shrinking fleet — Licensed numbers are down 95% from the 2014 Q3 peak of 28,332. Fewer cars on the road usually means fewer donor parts and fewer specialists.
- Check the actual ZR — These figures describe the model group. Enter the registration for that vehicle's free MOT, tax and mileage record before you pay a deposit.
Other MG models
- MG ZS — 77.7% pass
- MG 3 — 74.9% pass
- MG ZS Exclusive EV — 87.6% pass
- MG TF — 68.8% pass
- MG ZS Exclusive Vti-tech — 88.3% pass
- MG MGF — 66.8% pass
See every MG model MOT pass rate
Common questions
What is the MG ZR MOT pass rate?
63.7% of 1,786 class-4 initial MOT tests on the MG ZR passed first time in 2024 — below the 71.2% UK average.
Why does the ZR fail its MOT?
The most common initial failure categories are exhaust emissions (9% of tests), brake performance (7.9% of tests), transmission (6.4% of tests), component mounting prescribed areas (6.3% of tests).
How many MG ZR are left in the UK?
1,338 were licensed and 5,660 were SORN at the end of 2026 Q1, according to DfT and DVLA statistics for this generic-model group.
Does this tell me whether one particular ZR is a good buy?
No. These are population statistics. Enter that car's registration for its own MOT, tax and mileage record, then check outstanding finance, write-off and stolen markers before buying.
Methodology and limitations
MOT outcomes describe testable items at the time of inspection. They are not a measure of overall mechanical reliability.
Scope: Class 4 normal initial MOT tests completed in 2024. Models require at least 1,000 qualifying tests. Duplicate source rows are removed using official DVSA test IDs.
Source: Driver and Vehicle Standards Agency anonymised MOT tests and results, 2024, published 2025-05-23 under the Open Government Licence v3.0.
Check the actual car
Enter the registration for that car's own free MOT, tax and mileage record. Before money changes hands, the £9.99 full history check adds outstanding finance, insurance write-off and stolen checks.