Sensor on left front lower control arm?

[KarlS]

The new GT3 has a small shim connected to the inside of the lower control arm on the driver side. This shim is then connected to a sensor via what looks like a mini-drop link. The sensor wire runs up through the inner fender just under the ABS controller. This sensor was not on the Mk I GT3 and it is not on the Cup car. I'm guessing it is for the ABS system. The older ABS systems are known to go into fault mode on very bumpy surfaces and you have to shut off the ignition to reset them. This can be a real problem on a track with a bumpy surface in the brake zone. I'm thinking this sensor measures the rate and frequency of the front suspension movement and the ABS controller compensates when braking in a bumpy area.

Can anyone confirm or deny this? Also, is this standard on all 2003+ 996s or is it unique to the GT3?

TIA

Karl

[Loren]

The parts guide just calls it "sensor" and calls out option M601... but M601 is not defined in the list...

[KarlS]

Thanks, Loren. Is there a similar sensor on other 996's or is this unique to the GT3? I guess I'll either need to trace down the sensor wire or wait until I get the 2004 updates for my workshop manuals to solve this mystery.

Karl

[Tool Pants]

Do not know anything about a GT3 but that looks like the sensors on the suspension for the headlights on a Boxster and 996. Should also be another one on the left rear. 601 is the code for litronics. This is it on the left front on a 2003 Boxster with litronics. You can see the mini-drop link that runs from the suspension to the sensor in the middle of the picture. Jeff

[Loren]

Jeff is right. All cars with Litronics/Bi-Xenons have these angle sensors for automatic headlight beam adjustment on the left front and left rear.

[testdrv321]

Correct, that is the autoleveling sensor for the xenon lights.