Bentley Publishers - Technical Discussions : 1997 993 Horn / Airbag ...

knarvel

Posts: 1
Registered: 07/05/05

1997 993 Horn / Airbag
Posted: Jul 5, 2005 6:20 PM

My silver bullet Carrera S is now a clown car. The horn honks every time I turn a corner. Technicians tell me it's common that the airbag bracket rubber deterioriates and the horn contact complete circuit.

Can I do this repair myself?

magcuda

Posts: 771
Registered: 12/09/03

Re: 1997 993 Horn / Airbag
Posted: Jul 15, 2005 11:25 AM

in response to: knarvel

Reply

have your dealer check your car for any recalls. there are some 993s that the airbag would deploy when the horn was honked. the fix is a new horn relay with a ground wire modification. I don't know if this will fix your problem but you should make sure your car does not fall in to the recall.
if it is the horn contact you need to remove the airbag and the steering wheel to do this, there are a lot of safety precautions related to the air bag so be careful

porschetech

Posts: 133
Registered: 04/19/04

Re: 1997 993 Horn / Airbag
Posted: Jul 15, 2005 5:50 PM

in response to: knarvel

Reply

When it comes to the airbag system, the only thing to do is take in to an AUTHORIZED PORSCHE DEALER, BW

oregonjoe

Posts: 1
Registered: 06/26/06

Re: 1997 993 Horn / Airbag
Posted: Jun 26, 2006 6:15 PM

in response to: knarvel

Reply

Seems we have identical problems. Mine started a couple of weeks ago and has the added caveat of will go off under braking ie., with brake pedal depressed. Will be calling the mech tomorrow. I was thinking about disconnecting the horn in the meantime. Any idea if there is a fuse or wire? I had the same concern about going inside for a look with the airbag and all.

Oregon Joe.
96 993.

trusso

Posts: 1
Registered: 04/23/08

Re: 1997 993 Horn / Airbag
Posted: Apr 23, 2008 4:50 PM

in response to: oregonjoe

Reply

I just started having the same problem you described of the horn going off under braking.Could you please let me know what the problem was and what the fix was .Thanks
rooster
1998 993

Mboy71

Posts: 1
Registered: 06/12/08

Re: 1997 993 Horn / Airbag
Posted: Jun 12, 2008 1:25 PM

in response to: trusso

Reply

Hello: I have a 97 993 that is having the same issue: when I turn the steering wheel the horn blasts a series of short honks. Just wanted to see if you found out the cause of this and/or the solution. Any info. will be greatly appreciated.

Mboy71

noladuc

Posts: 1
Registered: 06/23/08

Re: 1997 993 Horn / Airbag
Posted: Jun 23, 2008 2:03 PM

in response to: oregonjoe

Reply

Has anyone been able to resolve the horn issue and are all the 993's involved 1997 models?
Thanks
Rob

pholcomb1

Posts: 1
Registered: 06/24/08

Re: 1997 993 Horn / Airbag
Posted: Jun 24, 2008 10:23 PM

in response to: noladuc

Reply

I have exactly the same problem. Especially on a hot day, horn starts stuttering with bumps/etc.

You can take the fuse out to stop the horn in the interim. Has anyone isolated it ? More importantly, what part do I need and where can I buy it ?

Thanks,

Patrick

'97 993

DCCSYR

Posts: 1
Registered: 09/09/09

Re: 1997 993 Horn / Airbag
Posted: Sep 9, 2009 1:55 PM

in response to: knarvel

Reply

This is a common 993, 4-spoke problem. The rubber bushings on the airbag retaining bracket fatigue. The repair is replacing the bracket 993.347.088.01. Cost ~$73. (For 1995s the bracket is discontinued, but the grommets can be removed from this one an inserted in your bracket.)

Procedure: You'll need to disassemble the air bag unit from the steering wheel first. Scary stuff. I dissconnected the battery first and let the car sit for 30 min just in case. Move key at least 30 feet from car (Porsche recommendation).

The next step is to dissconnect the air bag unit from the steering wheel. There are two T30 torx bolts on the back side of the steering wheel. They are accessed through two holes. This is the hardest part of the fix. If you turn your steering wheel about 90 degrees, it helps with getting access to them, but it still a bit of a contortion to see what you're doing.

Once the bolts are removed, the air bag can be pulled forward far enough towards you (the rear of the car) so you can disconnect the red coupling behind the bag. When you put the air bag aside, make sure to place the metal side down on some non-conductive surface. If the other direction, should the bag go off, it'll launch itself into the air.

Once the air bag wires are dissconnected, you will be looking at the air bag retaining bracket. Four bolts hold it in place which slide thru the metal ring/rubber grommets in each corner of the bracket. You'll also see where the retaining bracket metal comes in contact with points attached to the steering wheel. Remove the 4 bolts and bracket & replace.

After replacement, reconnect the battery.

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