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- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Brake Pad Wear Sensor - Front
Sold each - 2 required per car
Maintain the safety and reliability of your Porsche braking
system with this OE Match Brake Pad Wear Sensor, designed for
Porsche 928 models produced between 1978 and 1985. This sensor forms part of
the factory brake wear monitoring system, providing an early warning when brake
pads approach their service limit.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
The brake pad wear sensor is installed within the brake pad and is designed to trigger a warning light when the friction material wears to a predetermined level. This allows drivers to replace brake pads before braking performance is compromised or damage occurs to the brake discs.
For a high-performance grand touring car such as the Porsche 928, maintaining the braking system in optimum condition is essential for both safety and driving enjoyment.
What Does a Brake Pad Wear Sensor Do?
The brake pad wear sensor continuously monitors the 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 correctly functioning sensor helps:
- Monitor brake pad condition
- Provide early wear warnings
- Prevent excessive brake pad wear
- Protect brake discs from damage
- Improve maintenance planning
- Enhance braking safety
- Support reliable vehicle operation
The sensor acts as an important safeguard, helping owners identify when brake service is required.
Why Do Brake Pad Wear Sensors Fail?
Brake wear sensors operate in a harsh environment exposed to heat, moisture, road debris and vibration.
Common causes of failure include:
- Normal brake pad wear
- Sensor activation during pad wear
- Damaged sensor wiring
- Corrosion in electrical connections
- Heat-related deterioration
- Physical damage during brake servicing
- Water and dirt contamination
- Age-related material fatigue
In many cases, the sensor is designed as a service item and should be replaced whenever it has been triggered or damaged.
When Should a Brake Pad Wear Sensor Be Replaced?
Brake wear sensors should typically be replaced during brake pad replacement or whenever a fault is identified.
Common symptoms include:
- Brake wear warning light illuminated
- Intermittent brake warning messages
- Damaged or broken sensor wiring
- False brake wear warnings
- Sensor damage during brake servicing
- Corrosion around the sensor connection
- Brake pads being replaced due to wear
Replacing the sensor when fitting new brake pads helps ensure the monitoring system continues to operate correctly.
Why Replacement Matters
A functioning brake pad wear sensor provides an important warning system that helps protect both the braking system and vehicle occupants.
Benefits include:
- Accurate brake wear monitoring
- Improved vehicle safety
- Reduced risk of brake damage
- Early maintenance alerts
- Protection of expensive brake discs
- Reliable dashboard warning operation
- Improved servicing accuracy
- Long-term braking system reliability
For Porsche 928 owners, maintaining the brake wear monitoring system helps preserve the safety and performance expected from a Porsche grand tourer.
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Front Brake Pad Wear Sensor - These should be replaced when replacing brake pads.
Sold each - 2 required per car
Maintain the safety and reliability of your Porsche braking
system with these Front Brake Pad Wear Sensors.
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These OE direct-fit brake wear sensor integrates seamlessly with your Porsche's electronic braking system, ensuring accurate wear monitoring and helping prevent unnecessary brake disc damage caused by excessively worn brake pads.
What Does the Brake Pad Wear Sensor Do?
The brake pad wear sensor is an important safety component that monitors the thickness of the front brake pads. As the friction material wears down, the sensor eventually contacts the brake disc, completing an electrical circuit that activates the brake wear warning light on the dashboard.
Its primary functions include:
- Monitoring front brake pad wear.
- Activating the dashboard brake warning light.
- Preventing excessive brake pad wear.
- Helping protect the brake discs from damage.
- Supporting scheduled brake maintenance.
- Improving overall braking safety.
The sensor provides an early warning, allowing brake pads to be replaced before braking performance is compromised.
Why Do Brake Pad Wear Sensors Fail?
Brake wear sensors are consumable components and are
designed to be replaced during brake servicing. Common reasons for failure
include:
- Normal activation once the brake pads reach their wear limit.
- Heat generated by the braking system.
- Damage during brake pad removal.
- Road debris and moisture.
- Corrosion of the electrical contacts.
- Wiring damage caused by age or movement.
- General wear after years of service.
Once activated, the sensor cannot normally be reused and should always be replaced with new brake pads.
When Should the Brake Pad Wear Sensor Be Replaced?
Replacement is recommended whenever:
- The brake wear warning light is illuminated.
- New front brake pads are installed.
- The sensor has contacted the brake disc.
- The wiring has become damaged.
- Corrosion affects the electrical connector.
- During routine brake servicing.
- As part of a complete front brake overhaul.
Replacing the sensor at the same time as the brake pads ensures accurate future wear monitoring and avoids unnecessary labour costs.
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Fits: Left or Right, Price shown is for each wire sensor.
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Brake pad wear sensors help to indicate if your brake pads need changing. These should normally be replaced when replacing your brake pads.
Sold each, Fits Left or Right.
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Price shown is for each wire sensor.
This genuine Porsche brake pad wear sensor signals the brake system when the front brake pads are approaching their wear limits and need replacement.
Originally numbered 99160918180, this part now carries the updated Porsche reference 9GT907637 but remains identical in fit, function, and OE authenticity. It integrates with the vehicle’s ABS and braking system electronics to provide timely alerts and support safe operation.
The wear sensor continuously monitors brake pad thickness and electrical continuity. When the pad material reaches a specified minimum level, the sensor triggers a warning in the driver information system to indicate that pad replacement is due - helping you avoid excessive wear or potential damage to discs.
Function:
• Detects brake pad wear on the front axle
• Sends timely alerts to the vehicle’s onboard diagnostic system
• Helps prevent brake pad and disc damage due to overdue replacement
• Genuine OE Porsche design ensures perfect electrical integration
• Factory-tested for consistent performance and longevity.
Brake pads naturally wear over time, and monitoring their condition is critical for safe, reliable braking performance. A worn or missing wear sensor can lead to pad wear going undetected, increasing the risk of rotor damage and compromised stopping power. Replacing the wear sensor with a genuine Porsche OE part ensures accurate detection and maintains compliance with factory safety systems.
When to replace:
• Brake wear warning light activates on the dashboard
• After installing new brake pads If the sensor is damaged or broken
• During front brake servicing or rotor replacement
• When replacing brake calipers with integrated sensors
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