Olly350z

Its quite possible that the car has not been remapped to support the modifications to the exhaust system and the ECU is trying to over compensate hence it smelling extremely rich. This would tie with the CEL light coming on and having to be reset as getting the car remapped removes the rear O2 sensors The only way I think you could confirm if you have an O2 sensor issue is by what the codes are saying. If its pre cat codes then it could be a sensor, if its post cat codes then I'd say its not been remapped. Depends really how far you want to go. My advise would be to find a reputable Z specialist, Abbey Motorsport, Horsham developments to name two, and get them to check the exhaust system. They'll also be able to tell you if it's been remapped. It might be worth the diagnostic charge rather then throwing hundreds at sports cats etc which won't remedy the issue at this moment

@ZMANALEX

Disappointed I missed you at Beaulieu I wondered who the V1 nismo was 👌

Easy enough job providing you take your time, I used to do mine every couple of years because spark plugs are a cheap way to keep the best performing and running engine. Remove the airbox (two if you have a HR) and make sure not to touch the throttle body butterfly (s) and then simply work your way round one at a time. Do that, follow torque specifications and you'll be fine.

@RDON on this forum is selling an immaculate MK1 Nismo. Youd be silly to buy that ruined MK2 not even consider his.

Definitely 😉

Definitely not tyres causing the ABS light then, they're perfect size. I'd wager intermittent ABS sensor fault hence how it comes and goes. If it comes on any time during the MOT then it'll fail mate

Airbag warning light and ABS warning lights will both immediately fail an MOT. I suspect the ESP and traction control lights are on due to a fault with the ABS system as its all interlinked. If I was a betting man, I'd wager you have a failed ABS sensor. I'd highly recommend you get the vehicle scanned or you purchase one of the Bluetooth OBD scanners to give you an idea of where to start. Out of interest, what tyres are you running? If the wheel sizes are massively different from OEM that could be what's fooling the system into think there is a fault with the ABS

For my sins I am in the trade 🤣 not that it counts for much when people rarely seem to listen 🤣 no news on when the F520 is out yet with my supplier, however there seems to be a national tyre shortage as getting new tyres is a massive pain in the arse lately. I've been happy with the eco falkens fitted to my personal car, girlfriends audi and so on. The Bridgestones fitted to my nismo are wearing low so I'll be looking in the future

What about every 2000 miles like mine 🤣

Don't forget that an MOT is only the barest minimum road standard. A tyre at 2mm while not really safe will still pass an MOT. Alot of people get hung up on the fact that a car has passed an MOT its in good condition. Further compiled that alot of it is up to the individual MOT testers discretion, so what one might pass another might fail and vice versa.

This. We sell plenty of falken tyres to our customers and they are a perfect good choice to go for. Any tyre will let go in the wet or dry if you drive them hard enough. Certain types of falkens are actually some of the quietest tyres for sale, which let's not lie, a 370z needs all the help it can get with tyre and road noise 😉

I'm not embarrassed by what I've written at all. Full history means full history, way too many people stretch that truth when selling a car. My nismo, 5 out of 5 stamps, 5 invoices, 5 services = full history. 9 out of 18 is not full history. Especially at that price. Working on the service counter its not that unusual for people to do exceptionally low mileage and stick to the schedule to the letter, several customer's come to mind. Just say its not been serviced due to the low mileage, but that doesn't sound good does it 😕

Full service history of 9 stamps on an 18 year old car, that's some very good math. Shame it'll leak like a sive when it starts getting properly used. What a waste