Description
Bosch Vacuum Pump For Citroën And Peugeot Vehicles With 1.6 HDi And 1.6 e‑HDi Engines.
High-quality replacement Bosch vacuum pump designed for PSA 1.6 HDi / 1.6 e‑HDi diesel engines. This vacuum pump restores reliable vacuum supply for the brake booster and related actuators, helping maintain safe braking performance and proper operation of EGR and turbo control systems. Ideal for professional workshops and DIY mechanics looking for a direct-fit unit identified by the part numbers 9684786780 and 456584.
Technical Information
- Manufacturer: Bosch
- Model: Vacuum Pump For 1.6 HDi / 1.6 e‑HDi (DV6) Engines
- Product Codes: 9684786780
- Additional Numbers: 456584
Compatibility And Typical Fitment
Fits various Citroën and Peugeot models Equipped With 1.6 HDi / 1.6 e‑HDi Engines. Common Applications Include (Examples): Peugeot 207, 307, 308, 3008, Partner; Citroën C3, C4, C5, Berlingo. Always verify fitment against the listed part numbers and engine type.
Function And Location
The Vacuum Pump Generates Negative Pressure Required By The Brake Servo (Brake Booster) And Other Engine Systems That Require A Stable Vacuum Source On Diesel Engines Where Manifold Vacuum Is Insufficient. The Unit Is Mounted On The Cylinder Head And Is Mechanically Driven By The Engine To Provide Continuous Vacuum While The Engine Is Running.
Symptoms Of A Faulty Unit
- Increased Brake Pedal Effort And Reduced Brake Assist
- Illuminated Engine Or Brake-Related Warning Lights
- Hissing Or Vacuum Leak Sounds From The Engine Bay
- Poor EGR Or Turbo Actuator Response Where Vacuum Is Used
Why The Part Fails Most Often
Common Failure Causes Include Wear Of Internal Vanes Or Bearings, Seal Deterioration Leading To Oil Or Air Leaks, Contamination From Engine Oil Or Debris, And Mechanical Damage From Overload Or Extended Service Life. Many Vacuum Pumps Are Lubricated By Engine Oil; Seal Failure Can Allow Oil Ingress Into The Vacuum System Or Reduce Pump Efficiency.
Mounting Recommendations
Replace With A Unit That Matches The Exact Product Codes. Before Installation, Inspect Mounting Surface, Vacuum Hoses, And Check For Oil Contamination. Replace Any Seals Or Gaskets And Ensure All Vacuum Lines And Check Valves Are Free Of Blockages. Torque Fasteners To Manufacturer Specifications And Ensure Proper Alignment To Avoid Premature Wear. After Installation, Verify Vacuum Level At The Brake Booster And Check For Leaks.
Service Tips For Mechanics
- Test Vacuum With A Hand Vacuum Pump Or Gauge To Confirm Loss Of Vacuum Before Replacing The Unit.
- Inspect Brake Booster And Vacuum Hoses When Replacing The Pump To Prevent Recurring Issues.
- Observe Engine Oil Condition And Level; Excessive Contamination Or Low Oil Can Accelerate Pump Wear.
- When Replacing, Consider Replacing Associated Check Valves And Hoses If They Show Age Or Damage.
Keywords: Bosch Vacuum Pump, Citroën Vacuum Pump, Peugeot Vacuum Pump, 1.6 HDi Vacuum Pump, 1.6 e‑HDi Vacuum Pump, Part 9684786780, Part 456584.
