Replacement ABS Module Options
#1
Replacement ABS Module Options
I need to replace my abs pump / module to repair my return pump fault. Can I purchase a module out of any 996 or does the part number have to match exactly? I see many on eBay ranging from various prices, from as low as 25 to 1800, with part numbers varying by a digit or 2 at the very end. Picture of my pump for reference. I have a 2000 c2. Part number on the pump is 996.355.755.46
Also, is there any coding required when changing the pump / module?
Also, is there any coding required when changing the pump / module?
#2
Three Wheelin'
Coupes and 2wd Targas should be one part, then you have C4/GT/Turbo with and without PSM,
Just to not make your life suck I'd find one from the same year and model. With same antilock system.
Just to not make your life suck I'd find one from the same year and model. With same antilock system.
#3
Race Car
I matched the PN exactly. Yes, I saw a bunch of variants and no, I was not willing to chance it with all of them being a bunch of money and the install being a pain in the ***.
#4
Burning Brakes
Who diagnosed this? You said with the PSM pump disconnected you still had ABS correct?
If you are getting the 4460 code I'd try a proportioning valve on the secondary circuit. This code sometimes happen with a GT3 MC on a C2.
If you are getting the 4460 code I'd try a proportioning valve on the secondary circuit. This code sometimes happen with a GT3 MC on a C2.
Last edited by hbdunn; 05-11-2023 at 09:53 PM.
#5
Zbomb, did you have to code yours when you replaced it?
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
Last edited by jckol; 05-11-2023 at 10:05 PM.
#6
Race Car
Zbomb, did you have to code yours when you replaced it?
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
#7
Trending Topics
#8
Race Car
#9
Burning Brakes
Zbomb, did you have to code yours when you replaced it?
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
This does sound like what zbomb had. ABS module failure. Was hoping for you it wasn’t.
#10
Nordschleife Master
Do u have psm? If not a mk1, c2, nonpsm is about the cheapest one out there.
#11
Rennlist Member
I had an intermediate abs light coming on for a long time, that turned into permanent.
Duramatric was reading different codes every time, and sometimes not communicating with the module at all.
I got a used part of eBay with the same part number just in case.
I didn’t want to mess with the hydraulic lines, so I thought I will start with replace only the module.
it’s a bit difficult to get to one of the screws, but not as involving as replacing the whole unit and bleeding the system.
it solved my problem and the replacement module did not required any programming.
my car is 02 C2 no PSM.
Duramatric was reading different codes every time, and sometimes not communicating with the module at all.
I got a used part of eBay with the same part number just in case.
I didn’t want to mess with the hydraulic lines, so I thought I will start with replace only the module.
it’s a bit difficult to get to one of the screws, but not as involving as replacing the whole unit and bleeding the system.
it solved my problem and the replacement module did not required any programming.
my car is 02 C2 no PSM.
The following users liked this post:
plau (06-11-2023)
#12
I do have PSM, although, I not not against deleting it if it involves saving 1000+ dollars. I see boxster units as cheap as $25 on eBay lol. For that price I almost want to try it, but it's a headache to install / bleed the brakes after.
#13
Rennlist Member
the aluminum block is a set of mechanical valves. I find it hard to see how they can go bad (although possible).
in my case the ABS light came on even without driving the car, which lead me to understand the issue was electrical and not mechanical.
although I don’t have any experience with the PSM i still think replacing the module worth a try.
#14
Yea I think it might be worth a shot I am just not sure if that will have the same coding / function as mine. But again for $25-$60 it’s worth trying.
when I originally bled my brakes the fluid was green, maybe it was the abs module falling apart internally? Who knows.
when I originally bled my brakes the fluid was green, maybe it was the abs module falling apart internally? Who knows.
#15
Nordschleife Master
Or it was deluted Ate blue fluid. They dont sell it anymore but i still see it in cars occasionally.