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993 Key Fob Battery Contact Fix
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Pelican Technical Article:

993 Key Fob Battery Contact Fix

Gordon MacWilliam


30 min






small Philips screw driver, soldering iron, solder

Applicable Models:

Porsche 964 Carrera 2 (1993-94)
Porsche 964 Carrera 4 (1993-94)
Porsche 964 RS America (1993-94)
Porsche 964 Turbo (1993-94)
Porsche 993 Carrera (1995-98)
Porsche 993 Carrera 4 (1995-98)
Porsche 993 Carrera 4S (1996-98)
Porsche 993 Carrera S (1998)
Porsche 993 Targa (1996-98)
Porsche 993 Turbo (1996-97)

Parts Required:

discarded battery retention spring

Hot Tip:

You can easily fix your corroded key fob and prevent further corrosion

Performance Gain:

Improved key fob signal transmission

Complementary Modification:

Replace fob battery

Your key fob remote is essential to gaining entrance to your 993. If you have ever experienced problems with the fob, you know how frustrating this can be. Most devices containing batteries have plated (corrosion resistant) contacts, the negative terminal usually being a spiral spring, but for whatever reason Porsche used corrosion prone, weakly springed blade contacts. Between the corrosion and the weak spring action, the transmitted signal can be weak to non-existent.

To solve the majority of the problems, one only needs to remove a spiral spring from a discarded electronic device and solder it onto the negative terminal hole of the remote. This simple and easy to accomplish fix should take you under 30 minutes to complete.

Fob transmitting distance went from virtually nothing to 10 feet without a battery change. An incidental benefit is that there is no question as to where the negative terminal is.

Simply open the key fob by unscrewing the Philips screw.
Figure 1

Simply open the key fob by unscrewing the Philips screw. Remove the plastic cover. Insert spiral spring into the negative terminal (blue arrow). Solder spring in place. Insert battery and replace cover and screw.

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