B173d Peugeot May 2026

The part number for the Peugeot/Citroën AQS is typically 6441.C8 or 6441.C6 (always verify with your VIN). Generic OEM brands like Valeo, Hella, or Meyle produce reliable units for half the dealer price.

Replacement Procedure:

An interrupted update of the firmware (often done via OTA or a dealer diagnostic tool) can cause a mismatch between the software versions of the ECU and BSI. b173d peugeot

While rare for a single cylinder, some BlueHDi engines have a master fuse for the glow plug control unit. If this fuse blows, you will get multiple glow plug codes for all cylinders (B173C, B173D, B173E, B173F). If you only have B173D, the fuse is fine. The part number for the Peugeot/Citroën AQS is

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