Just had my 2003 Subaru Impreza WRX MOT'ed which it passed. However, I was told by the guy at Bell and Colvill (Subaru main dealer) that as I have a de-cat on the car, next year it would fail as the new rules state that it must have the Cat put back on for the MOT if one was fitted to the car as standard. This did not bother me as I would put the Cat back on which he said they do for most of the Lotus Elises they service.

I was then thinking, what if you have the Prodrive Performance Pack fitted to your car which I believe is an approved Subaru product, either from new or at a later date which I believe comes with a de-cat. Do you then have to buy a Cat seperatly to just pass the MOT?

 

Surely the Prodrive exhaust is just a sports Cat (100 cell) rather than a total de-cat??

I'm surprised yours passed the emmissions test without a cat as well!

Adam

 

The resonator is removed in a PPP and not the Cat.

 

I am sure one of the cats is removed on a ppp.
And I'm sure a Subaru guru will be along shortly to tell us.

 

Yes, it has done for the last few years since owning it. I never actually new it had a de-cat until the garage pointed it out when I first took it for its MOT. Apparently there are three cats on the blobeye and one of mine have been removed. Not sure which one though My ECU light comes on which I have been told is something to do with one of the sensors kicking off as the cat is removed. I just reset it with a reader from time to time.

Thanks for the info regarding the PPP. So if you have that kit fitted, you should be ok for MOT's thankfully. Just something I was thinking of as an option rather than having to buy a seperate cat and getting fitted and removed each time for the MOT.

 

I have the prodrive pack on my 05 STi.

Its just a cat back system and a sports cat (the 3rd cat).

It still passes emissions fine.

To be honest i think you can get away with removing 2 of te 3 cats before the EML comes on.

 

So if it is the 3rd cat thats been removed then getting the Prodrive pack will hopefully cure my problem. I guess I need to speak to Subaru and find out what cat has been removed.

 

My classic has had middle cat removed and past emissions last month. Mot guy didn't know how many cats it should have but I knew it should have been 2 lol

 

I only have my down pipe cat left in mine with straight through everywhere else, passes fine with no probs.

 

On an STi the PPP removes all the CATs (two on an STi) and replaces them with one Sports CAT.

 

On my hawk sti the prodrive exhaust had 1 cat on the down pipe. Im dont think its a 100 cell sports cat though. Stamped on the cat is a C7. Is this 700 cell?

 

These easy to do yourself before the test?

 

But what about a rotated setup? No room for a cat

 

I didnt know this!
i was under the impression the prodrive exhaust was just a cat back, with a sports cat replacing the 3rd cat.

So where is my cat? on the up-pipe before the turbo?

Think i need to get under the car and see whats what.

 

£25 to remove decat fit cat, refit decat at specialist garage

 

On the STI there is a cat in the downpipe and then another in the pipe directly after the downpipe, then the centre pipe then backbox.

My understanding is that a PPP removes the second cat, car will still meet the MOT emissions test and wont put on the MIL because only the first cat is diagnosed ( Lambda sensor each side of it ).

 

your ment to have a cat for them mot but i aint got one lol and it pass's every time

 

find a 'friendly' mot garage

 

Why would anyone want to spend around £1800 on a crappy generic map?

 

not saying a word

 

What about item 5 on here : http://www.newmot.co.uk/

Not good news if that comes into force

 

1 out of 5 isn't bad

Do i still pass?

 

''ECU unit has been illegally modified or 'chipped'.''


illegally modified?? do they mean if someone mapped your car against your will or something? lol

 

dose this mean my simtek is a mot fail ???

 

Yes! You go to directly to jail, do not collect £200 when you pass go...

 

so thats light's exhaust ecu what else on the thing is now a fail pmsl

 

It says " ECU unit has been illegally modified or 'chipped " so i depends on what there saying is illegal. I doubt things like ECUTeck, simtek ect would be classed as illegal.

 

how can they tell

 

wont be enforced, MOT testers are not able to lift the carpet or dig around passenger footwell to check ECU

 

Honestly, they'd see an ECUtek remap as illegal. But they're so blinded by black and white, they will not allow any grey areas

On the other hand, as Barnshaw says, hoepw the hell are they gonna check? 'Some' MOT testers don't know their a$$ from their elbow, others who are clued up on it won't have time to be snooping around as the garage owner wants them in and out to keep the money flowing