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Ignition switch substitution


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Every once in a while, my '98 Boxster ignition switch fails to engage the starter. I mean there is no electrical response at all. If I try again, sometimes on the 3rd or 4th attempt it will start, but sometimes it takes as many as 8 times. I was thinking it was maybe a faulty ignition switch so I ordered a replacement from AutohausAZ. Getting positioned on my back for access was hard, but I sure could have used a lot shorter arms. Finally I got the little bugger out of there. But my replacement looked like it was already replaced with an Audi switch part # 4B0 905 849.

When I tried to put the new switch in ( part # # 4A0 905 849B0E) I noticed it didn't seat correctly because it was too tall. plus the female end of the new switch wasn't oriented in a manner that it would insert when the key was in the "0" or off position.post-92309-0-50162300-1414994866.jpg. You can see in the photo that the porsche switch in black is taller and doesn't seat all the way in the receptacle.

Has anyone else had this problem ? Are there different assemblies for the '98 ?

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Every once in a while, my '98 Boxster ignition switch fails to engage the starter. I mean there is no electrical response at all. If I try again, sometimes on the 3rd or 4th attempt it will start, but sometimes it takes as many as 8 times. I was thinking it was maybe a faulty ignition switch so I ordered a replacement from AutohausAZ. Getting positioned on my back for access was hard, but I sure could have used a lot shorter arms. Finally I got the little bugger out of there. But my replacement looked like it was already replaced with an Audi switch part # 4B0 905 849.

When I tried to put the new switch in ( part # # 4A0 905 849B0E) I noticed it didn't seat correctly because it was too tall. plus the female end of the new switch wasn't oriented in a manner that it would insert when the key was in the "0" or off position.attachicon.gifimage.jpg. You can see in the photo that the porsche switch in black is taller and doesn't seat all the way in the receptacle.

Has anyone else had this problem ? Are there different assemblies for the '98 ?

 

You have the wrong switch, the 97-03 cars use one switch:

 

131-01060783-1040682.jpg

 

2004 and later use a different one:

 

18014-01113101-1094185.jpg

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Thanks JFP,

I'm sure that the black GP replacement part is not compatible with my current lock assembly. The white Audi switch fits perfectly. When I was researching on-line, Pelican Parts had an alternative part Number (4B0-905-849-M56) that looks like mine.It says it works  for Boxster ignition/lock assemblies 996 347 017 07 only . See link: http://www.pelicanparts.com/catalog/SuperCat/1042/POR_1042_ELIGNT_pg2.htm#item6. Says something like " Boxster (1997-04) FROM 04". Did Porsche service replace failing assemblies on the early models with '04 assemblies?  I guess I should have looked at the ignition/lock assembly part number. When I was in the not-so-comfortable Houdini position I didn't want to spend another 5 seconds looking.

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Yes, Porsche did upgrade the lock and switch assembly.

If you replace the old switch only with a new switch you will still likely get 5 or 6 years out of the new switch. A 15 minute job if you have done it before.

If you go the TSB update route then you must upgrade the whole steering lock assembly (much higher cost) but the problem should not re-occur. About 60 - 90 minutes if you have done it before.

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