Description
Product Overview
This Oil Vapor Vent Hose (crankcase breather connection) is designed for PSA 2.0 HDi RHR diesel engines and is commonly referenced by OE codes 9657540580 and 1192Z8. It controls and channels oil vapors from the engine crankcase back into the intake system to be burned, helping to maintain correct crankcase pressure, reduce oil leaks and limit hydrocarbon emissions.
Compatibility And Applications
Direct fit for a range of Citroën and Peugeot models using the 2.0 HDi RHR engine, including:
- Citroën C5
- Citroën C8
- Peugeot 307
- Peugeot 407
- Peugeot 807
This part is often searched by the product codes 9657540580 or 1192Z8, which simplifies correct identification at purchase.
Technical Information
- Manufacturer: PSA Peugeot Citroën
- Model: Citroën C5, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807
- Product Codes: 9657540580, 1192Z8
- Other Numbers: N/A
Function And Common Failures
The vent hose routes oil mist and blow-by gases from the crankcase to the intake. Over time the hose material can harden, crack or become clogged by oil deposits and soot. Typical symptoms of a failing breather hose include oil leaks around the connection points, increased oil consumption, rough idling, black smoke on cold start or an illuminated engine warning light due to altered intake vacuum or boosted crankcase pressure.
Replacement And Fitment Notes
Replacement is straightforward for experienced mechanics or competent DIYers but may require basic tools and some disassembly depending on engine bay layout. Typical steps:
- Allow the engine to cool and disconnect the negative battery terminal if required for safety.
- Remove any engine covers or intake ducting obstructing access to the breather hose.
- Loosen clamps or clips at both ends and carefully detach the old hose; inspect surrounding fittings for oil residue or damage.
- Install the replacement hose, ensuring secure seating and correct routing; tighten clamps to prevent vacuum leaks.
- Reassemble removed components and perform a quick idle/run check for leaks or abnormal noises.
If tight access or additional parts obstruct the hose path, consult a repair manual or a professional workshop for model-specific removal tips.
Durability And Maintenance
Hoses in the crankcase ventilation system are exposed to heat, oil contamination and engine vibrations. They typically last many years but should be inspected during routine service intervals or when symptoms appear. Replacing a degraded hose restores proper crankcase ventilation, helps prevent oil leaks and contributes to consistent engine performance.
Condition And Purchase Advice
This particular unit is a used replacement part and has been thoroughly tested; it is supplied in good, serviceable condition. Used parts are a cost-effective alternative to new OE components but always verify the OE/product codes and model fitment before ordering to ensure correct compatibility.
If you are unsure about fitment, check the vehicle’s parts catalogue or contact a mechanic with the OE codes 9657540580 and 1192Z8 to confirm compatibility.
