Information

Technical Information

Illegal to Supply for Vehicles Registered on or after 01/03/ 01 in the UK

Non-approved Catalytic Converters

Important information:

Do not buy this cat if your vehicle is being driven outside the UK, or it was registered in the UK after 1st March 2001.

Your car will likely fail the emissions test.

Please contact us so we can help you find the suitable type-approved catalytic converter for your vehicle

What are they and how do they work?

A Catalytic Converter (Cat) is an emissions control device that reduces the level of harmful exhaust gasses that enter the atmosphere. It works by converting exhaust emissions into less harmful ones when the gasses pass through it, triggering a chemical reaction.

Understanding Emissions Reports

A vehicle will fail an emissions test on either, or all, of the following factors:

• CO Failure can mean several things, but is most likely caused by a poorly running vehicle. If a Cat becomes contaminated with unburned fuel, it will become unable to effectively convert the gasses that pass through it. A new Cat at full capacity will almost certainly lead to a MOT pass, but unless the fault is rectified, the customer will return the next year complaining of the same problem.
• HC Failure is an indicator that the vehicle is over-fuelling. A vehicle will fail on this reading if it has HCs in excess of 200ppm. HCs in excess of 60ppm indicates a vehicle problem that needs rectifying as soon as possible.
• Lambda Failure means there is a problem with the air:fuel ratio on the vehicle. If the lambda reading is less than 0.97, the vehicle is running too rich. If the lambda reading is greater than 1.03, the vehicle is running too lean.

Cross references

Compatible with the following OEM references

Passenger/LCV Vehicles

BM Catalysts is Europe’s largest independent manufacturer of catalytic converters, diesel particulate filters (DPFs) and front pipes for the aftermarket.