Description
Brake Pressure Sensor for Citroën, PEUGEOT and DS Vehicles
The Brake Pressure Sensor (Part Numbers: 9673199580 / 457408) is a direct-fit replacement for many Citroën, PEUGEOT and DS models. Designed to provide accurate hydraulic pressure feedback to the ABS/ESP and engine management systems, this sensor helps maintain stable braking performance, proper ABS operation and correct brake-assist intervention. Ideal for professional workshops and experienced DIY mechanics looking for an OE-compatible part by part number.
Key Benefits
High-accuracy pressure readings for reliable ABS/ESP modulation, straightforward fitment on PSA platforms, and exact electrical interface for plug-in replacement. Buying by OE number (9673199580) ensures quick identification and compatibility during repairs or part searches.
Compatible Models (Examples)
- Citroën C4 II
- Citroën C4 Picasso
- DS4
- Peugeot 308
- Peugeot 3008 I
- Peugeot 5008 I
Technical Information
- Manufacturer: PSA / Stellantis
- Model: Citroën, PEUGEOT, DS
- Product Codes: 9673199580
- Additional Numbers: 457408
Function
The sensor measures hydraulic pressure in the brake circuit and sends an electrical signal to the vehicle control units (ABS/ESP/Brake Assist). The control units use this signal to modulate brake pressure during ABS events, to detect leaks or pressure loss, and to optimize braking assistance. A faulty sensor can cause ABS/ESP warning lights, degraded braking behaviour or incorrect brake-assist operation.
How It Is Replaced
Typical replacement steps for experienced technicians or skilled DIY mechanics:
- Park the vehicle on a level surface, engage the handbrake and block wheels.
- Depressurize the brake system and remove any protective covers to access the sensor (location depends on model; commonly mounted on the master cylinder or ABS hydraulic unit).
- Disconnect the electrical connector carefully and unscrew the sensor. Be prepared for some brake fluid leakage.
- Install the replacement sensor, tighten to the manufacturer’s torque specification, reconnect the electrical connector and replace any sealing washers if applicable.
- Refill and bleed the brake system as required to remove air and restore full pedal feel. Check for leaks and proper ABS/ESP system status after installation.
Installation Recommendations
- Use Correct Tools: Use the appropriate size sockets/wrenches and torque tools to avoid damaging threads or the sensor body.
- Brake Fluid Handling: Wear protective gloves and eyewear; brake fluid is corrosive. Keep the system clean and prevent contamination.
- Seals And Washers: Replace crush washers or seals if the original is damaged or per vehicle service instructions.
- System Bleeding: Bleed the brake system after replacement if brake fluid was lost or air may have entered the circuit.
- Diagnostics: After installation, clear fault codes and verify ABS/ESP operation with a diagnostic tool if available.
Why This Part Commonly Fails
- Contamination Of Brake Fluid: Moisture and debris accelerate internal corrosion and electrical contact failure.
- Corrosion Or Mechanical Damage: Corrosion of sensor threads or impact/damage during maintenance can cause leaks or loss of signal.
- Connector And Wiring Issues: Corroded or loose electrical connectors lead to intermittent signals or permanent failure.
- Age And Wear: Over time seals or internal components can degrade, especially in vehicles with high mileage or harsh conditions.
Typical Lifespan
Brake pressure sensors can last many years but may fail earlier due to fluid contamination, corrosion or mechanical damage. In practice failures are often seen on higher-mileage vehicles or vehicles exposed to aggressive environments.
Buying And Identification
Search by OE number (9673199580) for the fastest match. This listing is suitable for professional workshops and experienced DIYers who prefer to order parts by part number for accurate compatibility.
Final Notes
Replace faulty brake pressure sensors promptly to maintain correct ABS/ESP performance and safe braking. After fitting, always verify system operation and clear any diagnostic codes. If uncertain about the procedure, refer to the vehicle’s service manual or a qualified technician.
