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Brake Pad Wear Sensors
By OE Match
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Complete set of replacement brake wire sensors, 4 PARTS

Fits:
Porsche 928 4.5ltr - 1980 to 1982 *
Porsche 928 S 4.7ltr - 1981 to 1983
Porsche 928 S2 4.7ltr - 1984 to 1985
* Between chassis number 92-88101800 and 92-A0800749
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
BRAKEPADAC928S.FR.OEM
The product you are viewing cross references to these numbers
This kit is comprised of the following items:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
The OE Match Brake Pad Wear Sensor is a high-quality replacement braking system component designed to monitor brake pad wear and alert the driver when the brake pads have reached their service limit. Manufactured to OE specifications for fit, function and reliability, this sensor forms an important part of the vehicle's brake wear monitoring system.
Fits:
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
Installed directly into the brake pad assembly, the sensor provides an electrical signal to the vehicle's dashboard warning system when the brake friction material becomes excessively worn. This helps ensure brake maintenance is carried out at the correct interval, protecting both braking performance and associated braking components.
What This Product Does:
- Monitors brake pad wear levels.
- Triggers the brake pad wear warning light when pads reach their service limit.
- 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.
- Provides early warning of required brake servicing.
Symptoms Of Wear Or Failure:
- Brake pad wear warning light remaining illuminated.
- Intermittent brake wear warning messages.
- False brake wear warnings despite adequate pad thickness.
- No brake wear warning when pads are excessively worn.
- Damaged, broken or corroded sensor wiring.
- Physical damage to the sensor body.
- Electrical fault codes related to the brake wear monitoring system.
- Warning lights remaining active after brake pad replacement.
Why Replacement Matters:
- Brake pad wear sensors are exposed to heat, moisture, road debris, brake dust and constant vibration. During normal operation, the sensor is designed to wear alongside the brake pads and often requires replacement when new brake pads are installed.
- A faulty or damaged sensor can provide inaccurate wear readings, potentially leading to unnecessary warning lights or, more importantly, failure to alert the driver when brake pads require replacement. This can result in excessive brake pad wear, brake disc damage and reduced braking efficiency.
- Replacing a worn or damaged brake pad wear sensor ensures accurate brake wear monitoring, restores proper warning system functionality 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.
92861231305
The product you are viewing cross references to these numbers
- 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.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861231501
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
The OE Match Rear Brake Pad Wear Sensor is a high-quality replacement braking system component designed to monitor the condition of the rear brake pads and provide a warning when the friction material reaches its minimum safe thickness. Manufactured to OE specifications for fit, performance and reliability, this sensor plays a vital role in maintaining safe braking performance and ensuring timely brake maintenance.
Fits:
- Porsche 928S2 4.7L 1986
- Porsche 928S4 5.0L 1987-88
Installed directly into the rear brake pad assembly, the sensor forms part of the vehicle's brake wear monitoring system. When the brake pads wear down to a predetermined service limit, the sensor activates the dashboard brake wear warning light, alerting the driver that rear brake pad replacement is required.
What This Product Does:
- Monitors rear brake pad wear throughout the service life of the brake pads.
- Activates the brake wear warning light when brake pads require replacement.
- Provides early notification of brake maintenance requirements.
- 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 maintenance of the braking system.
Symptoms Of Wear Or Failure:
- Brake wear warning light remaining illuminated.
- Intermittent brake wear warning messages.
- False brake wear warnings despite adequate brake pad thickness.
- No warning light when brake pads are excessively worn.
- Damaged, broken or frayed 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:
- Rear brake pad wear sensors operate in harsh conditions and are constantly exposed to brake dust, heat, moisture, road debris and vibration. In many applications, the sensor is designed to wear alongside the brake pads and should be replaced whenever new rear brake pads are fitted to maintain accurate wear monitoring.
- A damaged or malfunctioning sensor can provide inaccurate information about brake pad condition, potentially resulting in unnecessary warning lights or failure to alert the driver when brake service is required. If brake pads wear beyond their safe operating limit, braking performance can be compromised and costly damage to brake discs may occur.
- Replacing a worn rear brake pad wear sensor restores accurate brake wear monitoring, ensures proper 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.
92861231304
The product you are viewing cross references to these numbers
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
The OE Match Brake Pad Wear Sensor is a high-quality replacement braking system component designed to monitor the condition of the brake pads and provide an early warning when they have reached their minimum service thickness. Manufactured to OE specifications for fit, performance and reliability, this sensor helps ensure brake maintenance is carried out before braking performance is compromised.
Fits:
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
Fitted directly into the brake pad assembly, the wear sensor forms part of the vehicle's brake monitoring system and communicates with the dashboard warning circuit. When the brake pad friction material wears to a predetermined level, the sensor activates the brake wear warning indicator, alerting the driver that replacement brake pads are required.
What This Product Does:
- Monitors brake pad wear during normal operation.
- Activates the brake pad wear warning light when pads reach their wear limit.
- Provides early notification of required brake maintenance.
- Helps prevent excessive brake pad wear.
- Protects brake discs from damage caused by worn-out pads.
- Supports safe and effective braking performance.
- Assists with preventative maintenance of the braking system.
Symptoms Of Wear Or Failure:
- Brake wear warning light remaining permanently illuminated.
- Intermittent brake wear warning messages.
- False wear warnings despite adequate brake pad thickness.
- No warning light 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 in the vehicle system.
- Warning light remaining active after brake pad replacement.
Why Replacement Matters:
- Brake pad wear sensors operate in a harsh environment, exposed to high temperatures, brake dust, moisture, road debris and constant vibration. As part of their design, many sensors are intended to wear alongside the brake pads and are commonly replaced during brake servicing.
- A damaged or worn sensor can provide inaccurate information regarding brake pad condition. This may result in unnecessary warning lights or, more critically, failure to alert the driver when brake pads require replacement. If brake pads are allowed to wear beyond their service limit, brake discs can become damaged, increasing repair costs and reducing braking effectiveness.
- Replacing a worn brake pad wear sensor restores accurate brake monitoring functionality, ensures the warning system operates correctly 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 whenever brake pads are replaced.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92861231502
The product you are viewing cross references to these numbers
OEMatch Brake Pad Wear Sensors — Stopping Power, Consistent Control
OEMatch brake pad wear sensors for Porsche models monitor pad thickness and provide timely warnings when replacement is needed. Accurate sensing supports routine maintenance, helps protect discs from excessive wear and contributes to predictable braking behaviour across classic and modern Porsche vehicles.
Understanding OEMatch Brake Pad Wear SensorsOEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original brake pad wear sensors. OE (Original Equipment) refers to parts matching original specifications for the brake pad wear sensors and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM brake pad wear sensors engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models. These sensors detect pad material loss either by completing or interrupting an electrical circuit or by a change in resistance as the pad wears, which triggers a dashboard warning or service message. Sensors are routed and secured close to the pads and rely on intact insulation and secure connectors to deliver reliable signals. OEMatch maintains a wide Porsche-focused catalogue and extensive OE cross-references to help identify the correct item for each model and application.
Benefits Include- Restores accurate pad-wear monitoring so replacements are identified in good time.
- Helps prevent unnecessary disc damage by prompting timely pad changes.
- Simplifies servicing with standardised connections and mounting that fit original locations.
- Supports consistent warning-system behaviour across many Porsche models.
- Exposure to high brake temperatures can melt or crack sensor housings or cable insulation.
- Corrosion or ingress from water and road salt can cause electrical faults.
- Abrasion and vibration can wear or fray sensor cables and protective sleeving.
- Poor connector contacts or incorrect routing during servicing may interrupt the signal.
Replacing faulty or degraded sensors preserves the vehicle’s ability to warn of low pad thickness, reducing the risk of disc damage and helping maintain braking consistency. Timely replacement supports scheduled maintenance and contributes to overall braking system reliability for Porsche models.
Advantages- Wide model coverage and OE cross-references to aid correct part selection.
- Designed to fit original mounting points and clearances for straightforward installation.
- Durable materials and connector designs intended to resist heat and contamination.
- Suitable for maintenance, restoration and routine brake servicing.
These items affect safety-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.