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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.
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94461221201
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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.

Fits:
- Porsche Boxster 981 2.7L 2012-16
- Porsche Boxster 981 S / GTS 3.4L 2012-16
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- Porsche Cayman S / GTS 3.4L 981 2013-16
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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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99160916500
The product you are viewing cross references to these numbers
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Fits: Left or Right, Price shown is for each wire sensor.

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- Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
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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.

Porsche 981C Cayman GT4 2016 - 2016 (FRONT CALIPER)
Porsche 982C (718) Cayman GT4 2019>> (FRONT CALIPER)
Porsche 982SP (718) Boxster Spyder 2019>> (FRONT CALIPER)
Porsche 991 GT2-RS with PCCB brakes (FRONT CALIPER)
Porsche 991 R / GT3 / RS / GT-Speed 2014 - 2017 (FRONT CALIPER)
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
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9GT907637
The product you are viewing cross references to these numbers
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