Description
Air conditioning compressor for Citroën and Peugeot vehicles. Tested functional.
Overview
This Sanden SD6C12 air conditioning compressor is a direct-fit option commonly used on a range of Stellantis Citroën and Peugeot models. It is frequently searched and identified by OE numbers such as 9651910980, 6453QJ and 6453QK, which makes it easy to find for both professional garages and DIY mechanics. The unit restores cooling performance when installed correctly and integrated into a properly serviced A/C system.
Technical Information
- Manufacturer: Sanden / Stellantis (Citroën / Peugeot)
- Model: SD6C12
- Product Codes: 9651910980, 6453QJ, 6453QK
- Additional Numbers: 6453WK, 6453WL, 6453ZZ
Compatibility
Typical vehicle applications include (non-exhaustive):
- Citroën Berlingo
- Citroën C2
- Citroën C3
- Citroën C4
- Citroën Xsara Picasso
- Peugeot 206
- Peugeot 307
- Peugeot Partner
Function And Common Symptoms
The compressor is the heart of the A/C system: it pressurizes and circulates the refrigerant between the evaporator and condenser, enabling heat exchange and interior cooling. Common symptoms indicating a failing compressor include:
- Weak or no cooling at cabin vents
- Unusual noises from the compressor area (grinding, rattling or squeal)
- Visible refrigerant oil leaks around the compressor shaft or body
- Clutch engagement issues (compressor does not engage)
How To Replace
- Recover refrigerant from the A/C system with approved recovery equipment.
- Disconnect the battery before removing electrical connectors.
- Remove drive belt and any obstructing components to access the compressor.
- Disconnect refrigerant lines (cap immediately to avoid contamination) and unplug electrical connectors.
- Unbolt and remove the compressor. Transfer clutch or pully components only if required by the replacement part instructions.
- Fit new compressor, replace O-rings with correct size and lubricant, torque bolts to manufacturer specification.
- Replace receiver/drier or accumulator and expansion valve if contamination is suspected.
- Evacuate the system with a vacuum pump (verify holding vacuum) and recharge with the correct refrigerant and specified oil volume.
- Start engine, engage A/C and check for proper operation and leaks.
Installation Recommendations
- Always Recover And Recycle Refrigerant Using Approved Equipment.
- Use New O-Rings And Lubricant When Reconnecting Lines.
- Replace The Receiver/Drier/Accumulator After Compressor Replacement To Avoid Contamination.
- Perform A Full Evacuation And Leak Test Before Recharging. A Vacuum Hold Test Is Recommended.
- Use The Correct Refrigerant (R134a On Most Listed Models) And The Appropriate PAG Oil Type/Volume (PAG Type Suitable For R134a, Typically PAG 46 — Confirm For The Specific Vehicle).
- Check Drive Belt, Tensioner And Idlers; Replace If Worn.
- Follow Manufacturer Torque Specifications And Safety Procedures; Disconnect Battery When Working On Electrical Connections.
Why This Part Most Commonly Fails
Typical causes of compressor failure include internal wear from age or contamination (metal particles from a failing component), loss of lubricant due to leaks, bearing or clutch failure, and overheating caused by insufficient refrigerant charge or blocked condenser. Contaminants in the system or a failed dryer/accumulator accelerate wear and can seize the compressor. Regular system maintenance reduces the risk of premature failure.
Notes
Searches for this part are often performed by OE numbers (9651910980 / 6453QJ / 6453QK / 6453WK / 6453WL / 6453ZZ). Verify compatibility by matching part numbers and model years. Proper installation, evacuation and recharge are essential to ensure long service life and correct A/C performance.
