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Brake pad wear sensor. Porsche 944 1987-89 ❭ 94461221201
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
The OE Match Brake Pad Wear Sensor is a high-quality replacement braking system component designed to monitor brake pad wear and provide a timely warning when the brake pads approach their minimum safe thickness. Manufactured to OE specifications for fit, reliability and performance, this sensor is an essential part of the vehicle's brake wear monitoring system.
Fits:
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
Installed directly into the brake pad assembly, the sensor continuously monitors the condition of the brake friction material. When the pads wear to a predetermined limit, the sensor activates the dashboard brake wear warning light, alerting the driver that brake service is required. This helps maintain optimum braking performance and prevents unnecessary damage to other brake system components.
What This Product Does:
- Monitors brake pad wear throughout the life of the brake pads.
- Activates the brake wear warning light when replacement is required.
- Provides early notification of brake maintenance needs.
- Helps prevent excessive brake pad wear.
- Protects brake discs from damage caused by worn brake pads.
- Supports safe and effective braking performance.
- Assists with preventative brake system maintenance.
Symptoms Of Wear Or Failure:
- Brake wear warning light remaining permanently illuminated.
- Intermittent brake wear warning messages.
- False brake wear alerts despite sufficient brake pad thickness.
- No warning indication when brake pads are excessively worn.
- Damaged, frayed or broken sensor wiring.
- Corrosion or physical damage to the sensor body.
- Brake monitoring fault codes stored within the vehicle system.
- Warning light remaining active after brake pad replacement.
Why Replacement Matters:
- Brake pad wear sensors operate in a harsh environment and are exposed to brake dust, heat, moisture, road debris and constant vibration. In many applications, the sensor is designed to wear alongside the brake pads and should be replaced whenever new brake pads are installed to maintain accurate monitoring.
- A damaged or malfunctioning sensor can provide inaccurate wear information, potentially leading to unnecessary warning lights or failure to notify the driver when brake pads require replacement. If brake pads wear beyond their safe operating limit, braking performance may be reduced and costly damage to the brake discs can occur.
- Replacing a worn brake pad wear sensor restores accurate brake wear monitoring, ensures correct operation of the dashboard warning system and helps maintain safe braking performance. An OE Match replacement provides factory-style fitment, dependable operation and long-term reliability, making it an essential component during brake servicing and maintenance.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94461221201
The product you are viewing cross references to these numbers
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman 2.9L 987C MKII 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 987.1 and 987.2 Boxster and
Cayman models, this sensor forms an essential part of the factory brake wear
monitoring system, providing an early warning when rear brake pads approach
their minimum service thickness.
Fits:
- Porsche Boxster 987 2.7L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman 2.9L 987C MKII 2009-12
Mounted within the rear brake pad assembly, the sensor continuously monitors brake pad wear and alerts the driver via the dashboard warning system when replacement is required. This helps prevent excessive brake pad wear, protects expensive brake discs and ensures the braking system continues to perform as Porsche intended.
Whether used on a daily-driven Boxster, a Cayman road car or a track-focused build, maintaining the brake wear monitoring system helps ensure optimum braking performance and safety.
What Does a Brake Pad Wear Sensor Do?
The brake pad wear sensor is designed to monitor the remaining thickness of the brake pad friction material.
As the brake pad wears down, the sensor eventually contacts the brake disc and completes an electrical circuit that activates the brake wear warning light on the dashboard.
A properly functioning sensor helps:
- Monitor brake pad condition
- Provide early brake wear warnings
- Prevent excessive brake pad wear
- Protect brake discs from damage
- Improve maintenance planning
- Support safe braking performance
- Maintain factory brake monitoring functionality
The sensor provides valuable advance warning before braking performance is compromised.
Why Do Brake Pad Wear Sensors Fail?
Brake wear sensors operate in a demanding environment exposed to constant heat cycles, moisture, brake dust and vibration.
Common causes of failure include:
- Normal brake pad wear
- Sensor activation once wear limits are reached
- Damaged wiring
- Corrosion within electrical connectors
- Heat-related deterioration
- Physical damage during brake servicing
- Water ingress Age-related degradation
As the sensor is considered a service component, replacement is generally recommended whenever new brake pads are fitted.
When Should a Brake Pad Wear Sensor Be Replaced?
The sensor should be replaced whenever it has been activated, damaged or when new brake pads are installed.
Common symptoms include:
- Brake wear warning light illuminated
- Intermittent brake warning messages
- Damaged or broken sensor wiring
- False brake wear warnings
- Corroded sensor connectors
- Sensor damage during brake servicing
- Rear brake pad replacement due to wear
Replacing the sensor during routine brake maintenance helps ensure continued reliability of the brake monitoring system.
Why Replacement Matters
A functioning brake wear sensor helps maintain braking safety while protecting other brake system components.
Benefits include:
- Accurate brake pad monitoring
- Reliable warning light operation
- Improved braking safety
- Protection of brake discs
- Reduced maintenance costs
- Better service planning
- Improved braking system reliability
- Long-term brake component protection
For Porsche Boxster and Cayman 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.
98761267601
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Front Brake Pad Wear Sensors - Sold each
Maintain the safety and performance of your Porsche braking
system with these OE Match Front Brake Pad Wear Sensors. Designed for Porsche 997 Carrera, Porsche 987 Boxster S and
Porsche 987 Cayman S models, these sensors form a critical part of the factory
brake wear monitoring system, providing an early warning when front brake pads
approach their minimum service thickness.

Fits:
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12
Mounted directly within the front brake pad assembly, the sensors continuously monitor brake pad wear and trigger the dashboard brake warning light when replacement is required. This allows owners to schedule brake maintenance before braking performance is affected or expensive brake disc damage occurs.
For high-performance Porsche sports cars, maintaining a fully operational brake wear monitoring system is essential for preserving braking efficiency, safety and long-term reliability.
What Do Brake Pad Wear Sensors Do?
Brake pad wear sensors monitor the remaining thickness of the brake pad friction material throughout its service life.
As the brake pads wear down, the sensor eventually contacts the brake disc and completes an electrical circuit that activates the brake wear warning light on the dashboard.
A properly functioning sensor helps:
- Monitor brake pad condition
- Provide early brake wear warnings
- Prevent excessive brake pad wear
- Protect brake discs from damage
- Improve maintenance planning
- Support safe braking performance
- Maintain factory brake monitoring functionality
The sensors act as a valuable preventative maintenance feature, helping avoid unnecessary brake system damage.
Why Do Brake Pad Wear Sensors Fail?
Brake wear sensors are exposed to significant heat, vibration, moisture and road contamination during normal use.
Common causes of failure include:
- Normal brake pad wear
- Sensor activation after reaching wear limits
- Damaged wiring
- Corrosion within connectors
- Heat-related deterioration
- Physical damage during brake servicing
- Water ingress Age-related material fatigue
Because the sensor is designed to work alongside the brake pads, replacement is normally recommended whenever new brake pads are installed.
When Should Brake Pad Wear Sensors Be Replaced?
Brake wear sensors should be replaced whenever they have been activated, damaged or during brake pad replacement.
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
- Front brake pad replacement due to wear
Replacing the sensors during routine brake maintenance ensures the warning system remains fully operational.
Why Replacement Matters
A functioning brake wear monitoring system helps maintain both safety and braking performance.
Benefits include:
- Accurate brake pad monitoring
- Reliable warning light operation
- Improved braking safety
- Protection of brake discs
- Reduced maintenance costs
- Better service planning
- Improved braking system reliability
- Long-term component protection
For Porsche owners, replacing worn brake wear sensors helps maintain factory braking standards and driving confidence.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99761275
The product you are viewing cross references to these numbers
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Boxster 987 MKII 2.9L 2009-12
- Porsche Boxster S 987 MKII 3.4L 2009-12
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche Cayman S 3.4L 987C 2005-08
- Porsche Cayman 2.9L 987C MKII 2009-12
- Porsche Cayman S / R 3.4L 987C MKII 2009-12

Porsche 997 C2 MKI 2005>> Front Caliper
Porsche 987 Boxster S 2004-08 Front Caliper
Porsche 987C Cayman S 2004-08 Front Caliper
Porsche 987 Boxster / Boxster S MKII 2009>> Front Caliper
Porsche 987C Cayman / Cayman S MKII 2009>> Front Caliper
Price shown is for each wire sensor.
Please select below Left or Right
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99761275
The product you are viewing cross references to these numbers
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