This is a question for all you MOT testers out there, I know this topic is subjective but I’d like to get an insight from people who deal with this on a daily basis. As of 2018 I’m under the impression that MOT rules changed to include a visual inspection of the particulate filter to check for tampering, non OEM welds, grind marks etc. My question is that what would YOU decide to do during a test encountering the following scenarios:
1. An aftermarket DPF was fitted, with a different design and sub par quality welds.
2. The original DPF had obviously been cut open and welded back shut, but this actually was for cleaning reasons.
3. The car was modified and the DPF and exhaust system had been wrapped in an aftermarket exhaust heat wrap product, obscuring the DPF.
All of these options are based on visual inspection alone and are assuming the vehicle passed the smoke test and did not have any warning lights on. I’d like to know your opinions and if you would pass or fail the vehicle. Thanks.
