MXKidd

iTrader: (1)

do you guys know if PCM's are interchangable between the 98 and 99 & newer models? The cars in question are a 98 T/A A4 and a 00 T/A A4. If the PCM's were swapped between these two cars, would they work?

thnks

JRcamaroZ28

iTrader: (41)

The pin outs are different so you cant just direct swap.

JR

MXKidd

iTrader: (1)

hmm..that sucks

you say it's not a "direct" swap. Can it be done somehow? Or is it not worth the trouble?

WILWAXU

iTrader: (6)

The 98's have a unique PCM. 99 & up are all the same with different programming.

Only way for a direct swap would be the entire wiring harness at the same time

josh1107

how hard is it to swap the wiring harness?

slow

iTrader: (7)

It required changing the cluster, and fuel tank to use all OEM parts.

A big pain...

Ryan

josh1107

so can i just leave the 98 pcm and harness alone and then install a 99+ engine ?

John_D.

iTrader: (2)

Yes, the 99 engine has all the same sensors in the same locations. So you can use your 98 engine harness with it. Except the 99 has a 2 wire coolant temp sensor, and the 98 has a 3 wire. So keep the 3 wire sensor from the old heads.

josh1107

thanks
anything else different when swaping between years?

josh

acdcgcsc

just buy a new harness you can get one for about 550.00 At superior harness company
501 982 1050 with new plug and new wire and heat shrink boot

777

iTrader: (21)

Just get a BS3