Denso O2 sensors, part number 234-4025
Guys,
Not posted in forever but this needs a mention.
My WS6 was running a bit erratic with random misfires when "on it" and a bit of a stumbly idle.
Also it was not down far enough to pass our emissions test during the annual check. After
considerable research I replaced the current Bosch 13111 sensors with Denso 234-4025.
This was after reading many forum threads on this site and others. One guy swore up and down
that this part number was good for ALL FOUR sensor locations on the exhaust system.
I have the post cat O2's tuned out when Steve at "Tuned by Frost" did me a replacement ECU
so they were not in this equation and I just had to concern myself with the upstream or pre
cat O2 locations.
My system is..... TSP 1 7/8" long tubes into a Kooks ORY and then into a pair of those spun Hi flow cats
which then goes into a Magnaflow I pipe, Magnaflow muffler and then the usual twin tail pipes.
The key mention here is TSP long tubes as other brands may have the O2 sensor in a position nearer
to the front of the car? Anyhow, the passenger side just fitted, but only just and is pulled fairly taut.
the drivers side is a miserable situation and it was about 6 inches too short!!! I had no choice but to
get creative and use the plug and some wire length from the outgoing Bosch and join to a snipped Denso
noting very carefully of the order of the wires!! Bear in mind I am in the UK and HAD to order from the states,
(Summit, in this case) and a quick return, swap or anything at all like this was not an option so snipped and
joined they got! (properly..... not twisted or anything sketchy!! Not ideal but all seems good and the car
is running fine.
So...... The guy on the "other site", who says the Denso fit all four bungs is lying!! He even said you have
to bunch up the surplus length and zip tie it... RUBBISH!!!! :thumbdn: :mad::rl:
By all accounts, the Denso are good so I will report back on that.
Hope this helps somebody..... Trev