bmw2002nut

Anyone know were the ignition control module is for a 99 passat 1.8?? Its gone bad before and I paid dearly to have it replaced. I can get the part for $250 and would like to change it myself but I cant seem to find it. Ive followed the wires from the coils to the ECU box, and into the fuse/relay area in the cabin above the pedals. Its a small flat black thing with a 4 slot plug on one side and a 5 slot plug on the other. I just cant find it tho Any help would be greatly appreciated. Since this is the second one already on mine, im sure others have had to change thiers.

kill lavelle

Sorry, I do not have your answer, but was wondering if you might help me. My 99 passat 1.8 appearently is not firing on #2 cylinder. The check engine light is flashing and there is heavy vibration during idle as well as tremendous loss in power. I switched the coils and the spark plugs to make sure they were not the cause. Are these the same symptoms your passat is displaying? I would rather not pay the VW labor charges either. Thanks.

bmw2002nut

Mine is also missing on #2 cyl. and I swapped coils and the coils are ok. I know its the signal coming into the coil. With the wiring harnesses disconnected from the coils, on the good cylinders I have 12v on one wire and a strong ground on one and a weak ground (more resistance) on the other. My #2 cyl has 12v and only one ground working. When I plug the wires into the coil, 2 wires have 12v and one ground, even on #2. It seems like I remember this to be the case 2 years ago and they replaced the ignition module to fix it. Im working on getting one from a wrecking yard to see if thats the prob before i spend 250 bucks on a new one, or I will just buy the used one if its cheap enough. I will let you know what I find. That is if I can find where the damn thing is!!!
Good luck!

boschmann

Haven't looked at one, but it's supposed to be on the right side (passenger) of the engine compartment.

AUTOVICE IMPRT SRV

the control module is in the right front corner of the eng compartment, under the plastic cover, the part should be available for under $200.00 for aftermarket

Luvmypassat

Hopefully you have fixed your problem by now, but if not, we recently had the same experience, we ended up taking it into the dealer, where they replaced the power output staging sensor, for a $527. The car is back to it's happy self.

bmw2002nut

I finally got it!! It was the ignition controll module and it is located on top of the air box in the front left corner of the engine compartment. Just take off the plastic cover to the air box and there it is. Two screws and two plugs and its an easy swap. I found one made by Huco instead of Bosch and saved myself $100. (150 instead of 250 for the Bosch) www.ecstuning.com It sounds like luvmypassat had a different problem. Im not sure if his simptoms were the same but if they were it could be a $150 gamble on changing the ECM. I have since found that the ECM is a common problem though. Hope that helps someone else and thanks for the responses.

milescp

My passat seems to be having the majority of these symptoms and all of these coments and responses may have answered my problem. My VW guy told me it might be the ignition control module, but I didn't get a price. Thank you so much.

bleedvw

guys it is not an ignition control module who ever is telling you this is incorrect or has there terminology incorrect. the problem is the power output stage as stated above and it is located on the air box under a black plastic cover. cylinder two is the most common one to fault due to the power output stage but i have seen some that were causing other cylinders to misfire. the power output stage was not used on the new vehicles after the 99 or 00 model passats

milescp

Ok thanks. I just ordered the ignition control module, so I guess we'll see what happens. I hope it works.

harthouse

ICM (ignition control module) also known as the power output stage and other aliases (ICM is most common name) failure is a very common problem with the 98 - 99 AEB 1.8T engines. Here is an excellent link on how to test and replace a bad ICM:

http://www.clubb5.com/forums/viewtop...ad8e2f449ec911

milescp

Thanks. I found it but I didn't know how to get the clips off. It should be coming in the mail in a few days, so I'll let yall know if it worked. Thanks so much, great link.

jmcapp9

I found a brand new ignition output module, p/n 4D0905351, for $84.25 by doing an internet search.

thomas12

Hi,
I tried to open this link but it dosn't work. I need to find this module in my passat. Could you please update this link.
Thanks

veedubmechanic

its right on top of the airbox. you need an 8mm socket to remove it from the airbox. just press the metal tabs down and pull the connector off the module. dont worry about the white stuff, its just dilectric grease (if you want you can buy some at the local parts store for about 2.00.

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