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Brake pad wear sensor. Porsche 997 C2S › 997612
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
The purpose of a brake pad wear sensor is to monitor pad thickness. When the pad material wears to a certain point, the sensor closes a circuit or sends a signal to the vehicle's brake control module, alerting the driver to replace the pads. Built to OEM specifications, it ensures the correct connector type, length, mounting clamp interface, and resistance calibration, consistent with factory parameters. It should normally be replaced when replacing your brake pads.
Sold each.

Porsche 997 C2S MKI 2005-08 Front Caliper
Porsche 997 C2S MKII 2009>> Front Caliper
• Position on Vehicle: Mounted adjacent to the front disc brake pads, typically clipped into the caliper or pad backing plate with the sensor end extending to contact the rotor or matching pad drain hole.
• Applications: Ideal when the original wear sensor has failed, is missing, or during brake pad replacement to ensure the wear-warning circuit remains intact and fully functional.
The brake pad wear sensor is a small yet essential part of your vehicle’s safety system. When it fails or is removed, your brake pad wear monitoring may become inactive - leading to unnoticed pad depletion, increased rotor wear or even unscheduled brake failure. Replacing it ensures that when your pads reach their safe limit, you’ll receive an accurate alert and can service your brakes in time.
When and why to replace:
• The brake pad wear warning light is showing, indicating the sensor circuit has been triggered or failed.
• The sensor wiring is damaged, corroded, or the sensor itself is missing or reused excessively.
• During brake pad replacement - fitting a new sensor ensures the system remains fully functional.
• After any caliper or brake overhaul where the original sensor connection might have been disturbed.
• When using non-standard or aggressive brake pads, where ensuring the warning circuit works is particularly important.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
997612
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19

Porsche 991.1 C2S / C4S 2012-16 FRONT
Porsche 991.2 C2S / C4S 2017>> FRONT
Porsche 991.1 Turbo >>2016 (FRONT)
Porsche 991.2 Turbo 2017>> (FRONT)
Porsche 991 GT3 2014-17 (FRONT)
For Cars with Ceramic brake PCCB (I450)
Porsche 991.1 C2 / C2S / C4 / C4S 2012-16 (FRONT)
Porsche 991.2 C2 / C2S / C4 / C4S 2017>> (FRONT)
Price shown is for each wire sensor.
Fits Left or Right
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
Porsche 991 C2 / C4 3.4L 2012>> (REAR CALIPER)
Porsche 991 C2S / C4S 3.8L 2012>> (REAR CALIPER)
Porsche 991 GT3 (REAR CALIPER)
Price shown is for each wire sensor.
Fits Left or Right
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99160918300
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
This has a Single pad sensor which is different to the superseding OE Sensor 9P1907637A that has a Double pad sensor. This will still work as standard by connecting this to any one single pad.
Porsche 991 C2 / C4 3.4L 2012>> (REAR CALIPER)
Porsche 991 C2S / C4S 3.8L 2012>> (REAR CALIPER)
Porsche 992.1 C2 / C2S / C4 / C4S 2019>> (REAR CALIPER)
Porsche 991 GT3 (REAR CALIPER)
without option 450, without IY2
Price shown is for each wire sensor.
Fits Left or Right
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99160918300
The product you are viewing cross references to these numbers
- Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
- Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
- Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
- Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
- Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
- Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
- Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
- Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
- Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
- Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
- Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
OE Match front brake pad wear sensor, confirm the brake equipment and application notes before selecting this sensor.
Fits
- Porsche 991.1 C2S / C4S 2012-16 FRONT
- Porsche 991.2 C2S / C4S 2017>> FRONT
- Porsche 991.1 Turbo >>2016 (FRONT)
- Porsche 991.2 Turbo 2017>> (FRONT)
- Porsche 991 GT3 2014-17 (FRONT)
- For Cars with Ceramic brake PCCB (I450) Porsche 991.1 C2 / C2S / C4 / C4S 2012-16 (FRONT)
- Porsche 991.2 C2 / C2S / C4 / C4S 2017>> (FRONT)
Fits Left or Right. Supplied individually as one wire sensor. Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
The sensor forms part of the vehicle's electrical pad-wear warning system, indicating when brake pad wear requires attention. It is a monitoring component, not a replacement for inspecting the pads and discs.
Functions
- Provides a pad-wear detection connection.
- Supports the dashboard brake-wear warning.
- Replaces a worn or damaged sensor wire during brake servicing.
Technical Details
- Supplied diagram reference: 99160918100; component identified as a sender wire or pad wear indicator.
- Diagram quantities are two wherever stated; these are assembly requirements, not the supplied pack quantity.
Symptoms of Fault
A brake-wear message remaining after pad renewal, damaged wiring or broken retaining clips warrants inspection. A warning can also indicate genuinely worn pads, so establish the cause before replacing the sensor.
Why Replacement Matters
Renewing a worn or damaged sensor supports correct operation of the pad-wear warning system. Assess the sensor, connector and cable routing during pad replacement rather than assuming an existing wire can be reused.
FAQs
Is this an axle set?
No. One sensor wire is supplied; several diagrams specify two for the assembly.
Does it fit every 991 brake system?
No. Check the model, production details and brake equipment, including the PCCB (I450) restrictions where stated.
Should it be renewed with the pads?
Plan to assess the sensors during pad servicing and replace any that are worn, damaged or unsuitable for reuse.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99160918100
The product you are viewing cross references to these numbers
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