Peugeot Citroen Siemens SID803 SID803A Original files | Tuning files and stage 1 remaps |

The SID803 and SID803A ECUs were used on the 2.0 HDI 16v engines from 2005 to 2010. They meet the EU4 emissions standards.

Most variants were 136 BHP, although some of the vans had a 120 BHP software, all hardware remained the same. Both can go to 180 BHp with a stage 1 remap.

You should match the 5WS40xxxx number on the ECU or for a more precise match, use the SW Upgrade number which is produced when you ID the ECU over OBD. There can be multiple versions using the Siemens 5WS number.

Here’s a collection of original files we have for the Siemens SID803 ECUs which use MPC processor memory, and then the SID803A ECUs which use a 2MB external flash memory: