Within your car’s exhaust system there are two areas that are hot spots for trouble and often need cleaning – the catalytic converter and the diesel particulate filter. Both of these cause problems for the efficient running of your car and can lead to it failing its MOT. In fact, Britain has a monthly peak of 43,000 cars failing the annual roadworthy test because of unacceptably dirty emissions from the exhaust.
Given the high cost of replacement parts, it’s no surprise that many drivers are embracing DIY cleaning products. These claim to return to good health congested catalytic converters or diesel particulate filters. We look at the options for drivers and ask whether they are worth using.