Why does emissions levels exceed default limits fail an MOT?

Emissions levels exceed default limits. Most commonly flagged on the Rover 214. The DVSA's MOT standards require this item to meet minimum safety thresholds — when it falls short, the tester logs it as a Major or Dangerous defect and the car fails outright.

How much does it cost to fix emissions levels exceed default limits?

Costs vary depending on the vehicle, region, and severity. Use our MOT cost estimator for typical UK garage rates across the most common failure items.

Emissions levels exceed default limits — MOT failure (314 cars, 2023)

Models most at risk.

Ranked by rate, not raw volume. A Fiesta shows every failure a lot because there are a lot of Fiestas. Rate = share of that model's own MOTs.

Cost orientation

Hard to predict in isolation — depends what's actually worn.

This defect doesn't map to a clean retail-part swap; ranges vary too widely without seeing the car. Use the estimator to bracket the all-in cost across the items most likely to surface alongside it.

Open estimator

Frequently asked.

Why does emissions levels exceed default limits fail an MOT?: Emissions levels exceed default limits. Most commonly flagged on the Rover 214. The DVSA's MOT standards require this item to meet minimum safety thresholds — when it falls short, the tester logs it as a Major or Dangerous defect and the car fails outright.
How much does it cost to fix emissions levels exceed default limits?: Costs vary depending on the vehicle, region, and severity. Use our MOT cost estimator for typical UK garage rates across the most common failure items.