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Maz007

Carrera 4 Control Alarm Unit Electrical Fire

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Hi, I need urgent advice please, I have a Porsche Carrera 4 911 996 2001, water has been found underneath seat where control alarmbox is situated labelled M535, Part Number: 996.618.262.01, and it is quite serious as the water created an electrical fire that melted control unit. The wires seem slightly corroded and the car will not start. Dash lights illuminate and I have disconnect Control Box. The door has a clicking noise and will not open.

I understand I need to have control box M535 changed that needs to be coded to new key form but curious as to your thoughts to the following:

1) Cost in replacing with new control unit and wiring loom?

2) How far does the wiring loom run if needs full replacement?

Interested in your suggestions and projected cost in fixing the above.

post-80010-0-91736300-1334402630_thumb.j

post-80010-0-97622700-1334402636_thumb.j

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In US dollars the control box a MSRP of $423.38 plus programming time.

All Porsche cars have custom wire harnesses and replacement is several day job and the custom harness is several thousand dollars from the Porsche factory (not to mention 6 weeks or more delivery).

You would likely be better off to splice in new wires or find a salvaged donor car that has the right portion of wiring to splice in. IMHO of course.

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If there was water there, you'll want to at minimum pull up all the carpets to see the extent of the damage...

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If there was water there, you'll want to at minimum pull up all the carpets to see the extent of the damage...

And clear all the cowl drains and inspect the drain tubes for damage and that they are properly secured.

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Hello..,

Did you call your insurance cie....

a year ago i have had a wiring fire with my BMW and finally the insurance scrapted my car....too expensive to fix...it should be the same for you or they will fix it with new wiring cable and new control box....that certainly worth a call because if you want to fix it perfectly it could cost you many many thousand dollars and of corse don't forget to ask for dammage evaluation and the repair at the dealership only...trust it will cost a lot more then you can think....

Good luck

Robert

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Thanks for your excellent responses and we will check and strip back wiring/cowl to see extent of wiring damage to determine if we can utilise existing wires instead replacement of new loom.

Yes we are checking with insurance also.

I have been told that replacement of Control Alarm Box does not necessary fix the solution as the wiring harness must also be coded or talk to the control box. Is that the case?

Edited by Maz007

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We stripped carpet back and wires are all in tack after 10cms and full wiring loom replacement would probably not be required. Problem we encountered while we were inspecting car is a small electrical burn now coming from Passenger Side Dash.

The Control Alarm Box below has seen better days and curious if you guys believe water caused the issue with small fire to control unit box or if you believe it sounds as though it is coming from the dash component?

We are looking to purchase this from insurance company reason now for very discounted price :notworthy: we are curious as to issue with wiring if it is worth pursuing to repair (obtaining part pay down by insurance from portion of payout) or to leave it as is:

post-80010-0-99938300-1334449189_thumb.j

post-80010-0-07446500-1334449327_thumb.j

Edited by Maz007

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That unit has without doubt been water damaged. I'm not sure what could have burnt at the dash area.

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