Catalytic Converter Repair & Replacement
Pass your MOT emissions test with our expert diagnostic and replacement service in Oldham.
Your Car’s Most Important Emissions Control Device
The catalytic converter, or “cat”, is a vital part of your car’s exhaust system. Its job is to convert harmful pollutants produced by the engine—like carbon monoxide and nitrogen oxides—into less harmful gases before they are released into the atmosphere. A functioning catalytic converter is absolutely essential to pass your annual MOT emissions test. If it’s failing, your car will be producing illegal levels of pollution.
Symptoms of a Failing Catalytic Converter
A faulty “cat” can present several symptoms that you shouldn’t ignore:
- Failed MOT Emissions Test: This is the most definite sign that your catalytic converter is no longer working correctly.
- Sluggish Performance: A blocked or clogged converter can restrict exhaust flow, making your car feel underpowered and slow to accelerate.
- Engine Management Light: Your car’s oxygen sensors can detect a problem with the “cat” and trigger a warning light on your dashboard.
- Rotten Egg Smell: A smell of sulphur or rotten eggs from the exhaust can indicate that the converter is not processing gases correctly.
- Rattling Noise: If the ceramic honeycomb inside the converter breaks apart, you may hear a rattling sound from underneath your car.
Legal, Type-Approved Replacements
When it comes to catalytic converters, using the right part is a legal requirement. We only supply and fit **Type-Approved** catalytic converters that are guaranteed to meet UK MOT emission standards. Cheaper, non-approved units will cause your vehicle to fail its MOT and are illegal for road use.
Our service starts with a full diagnostic check to confirm the converter is the source of the issue, as sometimes a faulty oxygen sensor can produce similar symptoms. Once confirmed, we provide a clear quote to supply and fit a fully compliant, high-quality replacement, getting you back on the road legally and with confidence.