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- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche 997 MKII Carrera C2S 3.8L 2009-12
Rear Brake Pad Wear Sensor - Sold each
Maintain the safety, reliability and performance of your
Porsche braking system with this OE Match Rear Brake Pad Wear Sensor. Designed specifically for Porsche 997 Carrera 2S and Carrera 4S
models, this sensor forms a vital part of the factory brake wear monitoring
system, helping drivers monitor rear brake pad condition and schedule
maintenance before braking performance is affected.
Fits:
Installed directly into the rear brake pad assembly, the wear sensor monitors the remaining thickness of the brake pad friction material. When the pads approach their minimum service limit, the sensor activates the dashboard brake wear warning light, alerting the driver that replacement is required.
For high-performance sports cars such as the Porsche 997 Carrera S models, maintaining the brake wear monitoring system is essential for preserving braking efficiency, protecting expensive brake components and ensuring maximum driving confidence.
What Does a Brake Pad Wear Sensor Do?
The brake pad wear sensor continuously monitors brake pad thickness throughout its service life.
As the brake friction material wears down, the sensor eventually contacts the brake disc and completes an electrical circuit, triggering the brake wear warning light on the instrument cluster.
A correctly functioning sensor helps:
- Monitor brake pad condition
- Provide early brake wear warnings
- Prevent excessive brake pad wear
- Protect brake discs from damage
- Improve maintenance scheduling
- Support safe braking performance
- Maintain factory brake monitoring functionality
The sensor acts as an important preventative maintenance component, helping avoid costly brake repairs.
Why Do Brake Pad Wear Sensors Fail?
Brake wear sensors are exposed to extreme operating conditions including heat, vibration, moisture and road contamination.
Common causes of failure include:
- Normal brake pad wear
- Sensor activation when brake pads reach their wear limit
- Damaged wiring
- Corrosion in electrical connectors
- Heat-related deterioration
- Water ingress
- Physical damage during brake servicing
- Age-related material fatigue
As brake wear sensors are considered service items, they should be replaced whenever they become activated or damaged.
When Should a Brake Pad Wear Sensor Be Replaced?
Replacement is recommended whenever brake pads are changed or if the sensor has become damaged.
Common symptoms include:
- Brake wear warning light illuminated
- Intermittent brake warning messages
- Damaged or broken sensor wiring
- False brake wear warnings
- Corroded electrical connections
- Sensor damage during brake servicing
- Rear brake pad replacement due to wear
Replacing the sensor during brake pad replacement ensures the monitoring system continues to function correctly.
Why Replacement Matters
A functioning brake wear sensor helps maintain braking safety and protects expensive brake system components.
Benefits include:
- Accurate brake pad monitoring
- Reliable dashboard warning operation
- Improved braking safety
- Protection of brake discs
- Reduced maintenance costs
- Better servicing planning
- Improved brake system reliability
- Long-term braking component protection
For Porsche 997 owners, maintaining the brake wear monitoring system helps preserve both performance and peace of mind.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99761267602
The product you are viewing cross references to these numbers
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Porsche 944 S2 1989-91 Front or Rear Caliper
Porsche 944 Turbo 1987-91 Front or Rear Caliper
Porsche 944 Turbo S 1987-91 Front or Rear Caliper
Porsche 968 1992-95 Front or Rear Caliper
Price shown is for each wire sensor.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94461236502
The product you are viewing cross references to these numbers
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
Price shown is for each wire sensor.
Porsche 944 S2 1989-91 - Front or Rear Caliper
Porsche 944 Turbo 1987-91 - Front or Rear Caliper
Porsche 944 Turbo S 1987-91 - Front or Rear Caliper
Porsche 968 1992-95 - Front or Rear Caliper
Brake pad wear sensor monitors pad thickness and alerts the driver when the brake pads have reached a wear limit, ensuring timely replacement and maintaining braking performance. Manufactured to OE specification, this sensor features the correct connector, cable length, mounting clip and resistance values, making it a reliable replacement for Porsche’s factory part.
• Position on Vehicle: Located at the brake caliper or backing plate where it detects the pad wear through contact or cable resistance change.
• Applications: Ideal when the original wear-sensor is damaged, disconnected, corroded, or when replacing brake pads and you wish to restore full safety and original monitoring function.
The brake pad wear sensor is an integral part of modern braking systems: it notifies the driver when pad material is low, ensuring timely servicing and helping avoid damage to rotors or calipers. A failed or missing sensor can lead to unnoticed pad wear, reduced braking efficiency and potential safety hazard. Replacing it ensures consistent pad life tracking and supports safe vehicle operation.
When and why to replace:
• Original sensor unplugged, broken or corroded
• Brake pads replaced without reinstalling a proper sensor
• Warning light for brake pad wear is triggered or malfunctioning
• Restoring a vehicle to original specification including all safety monitoring components
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94461236502
The product you are viewing cross references to these numbers
- Porsche 964 (911) C2 1989-93
- Porsche 964 (911) C4 1989-93
- Porsche 964 (911) RS 3.6L 1991-93
- Porsche 964 (911) RS 3.8L 1991-93
- Porsche 964 (911) TURBO 3.3L 1991-93
- Porsche 964 (911) TURBO 3.6L 1991-93
- Porsche 993 (911) C2 1994-97
- Porsche 993 (911) C4 1994-97
- Porsche 993 (911) RS 1994-97
- Porsche 993 (911) C2S 1994-97
- Porsche 993 (911) C4S 1994-97
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) GT2 1994-97
- Porsche 993 (911) TURBO S 1994-97
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 968 3.0L 1992-94
- Porsche 968 Sport 3.0L 1994-95
- Porsche 968 CS 3.0L 1993-95
- Porsche 968 Turbo S 3.0L 1993-94
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Fits front and rear brakes
and
Fits:
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998
Porsche 944S2 - 1987 to 1991
Porsche 944 turbo - 1985 to 1991
Porsche 968 - 1992 to 1995
Porsche 928 S4 / GTS - 1987 to 1992
Click 'Zoom in' for large parts diagram.
Diagram ref no 21
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861236100
The product you are viewing cross references to these numbers