Replacing 996 sensors?
08-29-2018, 01:22 PM
#4
Rennlist Member
Technically - yes you should replace them. If they're not totally ground away, I suppose you could re-use them, but they're cheap so most people just replace them. ** many people also just zip tie them out of the way...
08-29-2018, 01:42 PM
#6
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Since the brake wear indicator light went on, then yes, you have to replace the sensors. It will be difficult to determine which wheel/brake caliper set the brake wear light on, so replacing all four is a good idea. They are not that expensive.
08-29-2018, 04:11 PM
#7
I have a random brake wear light on and off. My brakes are good. I ordered a pair of sensors but they don't look like they fit my MY2000 C2. Not the part that plugs into the pads, the other end. Is there more than one type of sensor for the 996? The one I have is 99661236500.
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08-29-2018, 04:27 PM
#8
Race Director
Any marginally-witted person with a multimeter can determine which one is tripped - it's a loop. If you have no resistance between the two pins for each sensor, it's good. If you have infinite resistance between the two pins, it's the bad one.
You can also visually determine which one has been burned through simply by removing them from the pad, which you'll need to do to reuse them anyway.
Mine have been zip-tied to the brake lines for 5 years.
You can also visually determine which one has been burned through simply by removing them from the pad, which you'll need to do to reuse them anyway.
Mine have been zip-tied to the brake lines for 5 years.
08-29-2018, 04:42 PM
#9
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I have a random brake wear light on and off. My brakes are good. I ordered a pair of sensors but they don't look like they fit my MY2000 C2. Not the part that plugs into the pads, the other end. Is there more than one type of sensor for the 996? The one I have is 99661236500.
08-29-2018, 04:57 PM
#10
That's what the ones I ordered look like. I'll have to check my car again. When I last looked it seemed that the connector end was different than what was on the car. When checked visually, all of them appeared to be fine, I'm guessing there is a loose/broken wire in one of them as the issue is intermittent. I have a multimeter. I just have to find a marginally-witted person.
Last edited by wyovino; 08-29-2018 at 05:51 PM.
08-29-2018, 11:43 PM
#11
If you check your brakes frequently and don't want to bother with the annoying light or the expense of replacing sensors, just permanently short out all 4 circuits and be done with it. A nice way to do this is to remove the old sensor and clip it so you have an inch or two of the two wires sticking out of the connector. Then solder the two wires together and cover the joint with a piece of heat shrink tubing. Plug it back in and you're set. That way the connector still fits in the little metal clip and nothing will rattle loose or get flexed/chafed. No dependency on zip ties.
These sensors are pretty worthless. If you're tracking your car, you're changing and checking your brakes often enough that you don't need help. If you aren't tracking it, then your brake wear should be sufficiently slow that you can monitor it during annual state inspection, during seasonal tire changes etc. In all cases, the light will come on long before it's unsafe to use the brakes, so it's a nuisance alarm.
These sensors are pretty worthless. If you're tracking your car, you're changing and checking your brakes often enough that you don't need help. If you aren't tracking it, then your brake wear should be sufficiently slow that you can monitor it during annual state inspection, during seasonal tire changes etc. In all cases, the light will come on long before it's unsafe to use the brakes, so it's a nuisance alarm.
08-30-2018, 08:54 AM
#12
Rennlist Member
These are the ones I used... https://www.ecstuning.com/b-sebro-pa...661236500~seb/ 
$33 ea. is just silly $ for such a simple part. Once your pads are worn down enough to trip the sensor, you'll know your brakes are not performing up to par...
$33 ea. is just silly $ for such a simple part. Once your pads are worn down enough to trip the sensor, you'll know your brakes are not performing up to par...
09-02-2018, 09:36 PM
#13
Here's how you find which sensor is the bad one -
1. Randomly select any three wheels.
2. Remove the wheels, Remove and visually inspect the sensor wires. Test each sensor for continuity. Reinstall each wire and each wheel.
3. The fourth one will be the one that needs to be replaced.
I had visually inspected the sensors several times, looking at the parts that plug into the pads. In my case, it was the other end of the wire that was damaged and couldn't be seen until it was unplugged from the wheel carrier.
1. Randomly select any three wheels.
2. Remove the wheels, Remove and visually inspect the sensor wires. Test each sensor for continuity. Reinstall each wire and each wheel.
3. The fourth one will be the one that needs to be replaced.
I had visually inspected the sensors several times, looking at the parts that plug into the pads. In my case, it was the other end of the wire that was damaged and couldn't be seen until it was unplugged from the wheel carrier.
09-02-2018, 10:31 PM
#14
When I order a set of rotors and brakes, usually the brake sensors come with the package. I don't think you need to spend the extra money for OEM on this particular part. I usually advise people to stick with factory parts whenever possible, but not for something simple like this part. I wouldn't zip tie them away from the pads either. Not a good practice.