Lifted from one of my posts on another thread :
I'm not sure what the new regs are trying to achieve.
Any car fitted with a CAT from new (from around 1993 IIRC) needs to pass the CAT efficency test as part of the MOT.
IIRC, if it passes the standard test then all is OK, but if it marginally fails then there is a longer CAT test procedure, which it can still pass.
A car fitted with a Cat from new that doesn't have one fitted for the MOT is never going to pass this test.
So IMHO the visual check that a Cat is fitted is worthless and been blown out of proportion on alot of car forum's.
What it may be trying to achieve, which isn't clear, is that cars with multiple cats must have 'ALL' cats fitted as from new. So this would end up being more of a visual check. But the MOT info/operator would have to be pretty well clued up i.e WRX cat in up-pipe scenario ??
|