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Brake Clutch and Cruise Control Switch Replacement - Porsche 911 Carrera

Pelican Technical Article:

Brake Clutch and Cruise Control Switch Replacement - Porsche 911 Carrera


30 minutes30 mins


$20 to $50





Applicable Models:

Porsche 996 Carrera models (1999-05)
Porsche 996 Turbo, GT2, GT3 (2001-05)
Porsche 997 Carrera models (2005-08)
Porsche 997 Turbo, GT2, GT3 (2007-08)

Parts Required:

New pedal switches

Hot Tip:

Twist the old switch to remove it

Performance Gain:

Working brake lamps, cruise control

Complementary Modification:

Install aftermarket pedals

There are three pedal switches on the 911 Carrera, two on the clutch pedal and one on the brakes. They get a lot of use, and they all have a tendency to fail once and a while. Replacement is really easy, and should take only about 30 minutes.

For the brake switch, the first step is to verify that your brake lamps are not working. If you're by yourself, then wait until nighttime and back up against a wall. You should see the reflection off of the wall when you step on the brakes. If you don't, then your switch is probably shot. It's important to note that the switch has redundancy built in, and the warning system should tell you when your switch is failing, but this doesn't always work.

The clutch pedal has two switches. One switch controls the cruise control (turns it off when you push in the clutch), and the other won't let you start the car without the clutch pedal pushed in. The micro-switch only activates when the clutch is fully depressed where as the cruise control switch disengages the cruise control as soon as you begin to activate the clutch. If you're having intermittent starting problems with your car, I would look at the micro-switch first.

Curious, but the cruise control switch is identical to the brake pedal switch except that the cruise control switch is red, and the brake pedal switch is a translucent brown. Both switches have three of the same the same part numbers printed on them.

The switches are relatively easy to access, as they are located right above the pedals. You will have to open the passenger door and then stick your head into the footwell to see them. You may find removing the knee panel gives you more room. Replacement is easy--simply unplug the harness from the end and then twist to remove the switch. If you need to manhandle and/or break the switch to remove it, that's perfectly okay, since you will be replacing it with a new one anyways. The clutch pedal switch that prevents the car from starting is a standard micro-switch mounted with screws.

To finish the job, simply install the new switch into place, and reconnect the wire harness. Test the brake lights to make sure that they are working properly, and then reinstall the knee panel.

Here are the two clutch pedal switches.
Figure 1

Here are the two clutch pedal switches. The yellow arrow points to the micro-switch that prevents the car from starting if you don't have the pedal pushed in. The red switch is the one that deactivates the cruise control when you push the clutch in.

Here's a photo of the brake pedal switch (green arrow).
Figure 2

Here's a photo of the brake pedal switch (green arrow). Simply unplug the harness, twist the switch, and then remove it from the chassis. The lower left inset photo shows the brake and cruise control switches together. The only difference between these two is the color of the housing.

Comments and Suggestions:
Kapolei-Jon Comments: Aloha,
I have the issue of difficult to start. I have to push the clutch several times and try to start it many times. is there another component to this micro switch that might also be a problem
August 10, 2017
  Followup from the Pelican Staff: is the starter not engaging or is the engine cranking and not starting? - Nick at Pelican Parts  
MIKE Comments: 2001 Porsche 911 Cabriolet
After a few miles of driving my ABS and PSM lights come on. ABS continues to work. No codes stored. restart and they are out for a few miles. Bumps seem to make them come on sooner.
Also; cruise control lights up but won't set. No codes here either.
March 29, 2017
  Followup from the Pelican Staff: You will need to check the faults, sounds like a steering angle sensor plausibility fault, which can usually be fixed with a simple computer calibration. - Casey at Pelican Parts  
Ben Comments: I have a 2007 997 Carrera S and a warning light saying Rear Right Brake Failure keeps coming on but the globe is fine. I have changes bulbs but message keeping coming on and off. Also intermittently the PSM Failure waring light comes on but goes off again after stopping and restarting the engine.
I think the problem could be the Brake Light Switch??
January 18, 2017
  Followup from the Pelican Staff: The bulb or bulb holder could be faulty, causing a resistance issue, turning on the warning light. - Nick at Pelican Parts  
daveshemi426 Comments: I have 2904 911 conversation abs and psm light is on every thing checks out good . stir I hear brake light switch can set that off?
July 17, 2016
  Followup from the Pelican Staff: What fault codes are stored? - Nick at Pelican Parts  
Stu Comments: Bob I have a 2003 911 Conv. and my switch is just above the Brake pedal
June 8, 2016
  Followup from the Pelican Staff: Thanks for the input on this one. We appreciate the help.
- Nick at Pelican Parts
Bob Comments: Nick,
Re.comment by Bob, May25, 2016, I was referring to removal of the knee panel on a 2003 Porsche 911/996 in order to facilitate replacement of the brake light switch.
June 3, 2016
  Followup from the Pelican Staff: You should not need to remove the panel. Just grab the air duct under the dash and pull it down. Then you will be able to see the switch. - Nick at Pelican Parts  
Bob Comments: You mention removing the knee panel to get at the brake and clutch pedals. I cannot budge my panel. Any tips on how to do this?
May 25, 2016
  Followup from the Pelican Staff: What vehicle are you working on? - Nick at Pelican Parts  
yayo_ayala Comments: Guys I have a 1989 3.2. I am having some issues with the clutch switch does someone has a picture that can help me. I will appreciate, thanks!

The following link has a picture of my car showing the pedals.
June 14, 2014
  Followup from the Pelican Staff: I don't have a picture. I opened a post in our forums. A Pelican community member may be able to answer your question.
- Nick at Pelican Parts
Sal Comments: Where is the break light switch located and how do I replace it
If it is by the master cylinder ..... Where is that and can I do this by myself if I am no mechanic
1986 targa
June 1, 2014
  Followup from the Pelican Staff: There are two, and located on the side of the brake master cylinder. Depending on your experience, you may be able to do it. You will have the bleed the brakes during the procedure.- Nick at Pelican Parts  

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Page last updated: Sun 1/21/2018 02:38:49 AM