Brake pad wear sensor. Porsche 928 1979-85  ❭  92861231501

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.