None of my sensors have triggered a warning on the dash, so I assume they are all able to be reused? I see that there's one for each caliper, so I'd rather not buy 4 new sensors if I don't need to. Do they often break or not go back in easily such that I should get new ones?

996-612-365-00-M163
Brake Pad Sensor, One Per Caliper, Each
FRONT or REAR - 996 Carrera (1999-04), Carrera 4 (1999-05), 996 Turbo (1999-05)
Brand: PEX $9.75

Also, I see that there's a mounting kit. I likewise assume I don't need this unless something went wrong during installation, etc. Are there known problems with these parts that suggest I should get these as well?

Rear:
996-351-959-01-M100
Brake Pad Retainer Kit, 1 kit enough for 2 wheels, front 996 Carrera (1999-05), front 996 Carrera 4 (1999-01), front 996 Carrera 4 (2002-05 except S), rear 996 Carrera 4S (2002-05 except M450 Ceramic), rear 996 Turbo (2001-2005 except M450 Ceramic), Each
Brand: Genuine Porsche $39.00

Front:
996-351-959-11-M100
Brake Pad Retainer Kit, 1 kit enough for 2 wheels, front 996 Carrera 4S (2002-05 except M450 Ceramic), front 996 Turbo (2001-2005 except M450 Ceramic), Each
Brand: Genuine Porsche $70.00

 

There should be no reason to replace any of these unless they have ground downtown activation. However at the low cost any people go ahead and replace the sensors themselves. The process ofbrakepad changes is so simple once you get past the first wheel you will fly through them. Many track cars don't even have the sensors as they'd outfit the pads, in theses cases mm are the controlling factor. Good luck

 

Thanks. Yeah, read a write-up last night on the changing and looks easier that what I'm used to on other VW/Audi/BMW cars. I don't plan on changing them until I'm at the track, so I'd like to ensure I'm prepared and have everything I need, etc.

Thanks,
Mark