MAN Retarder ECU Emulator; This module replaces faulty EST 52 and EST 54 retarder modules. This emulator will clear all retarder errors in your vehicle.
When the retarder fails in MAN trucks, the automatic transmission disengages and switches to semi-automatic mode. Cruise control also stops working. You will begin to see a retarder failure message on your vehicle’s display.
After installing the retarder ECU emulator, all retarder-related errors will be cleared, and your automatic transmission will continue to operate smoothly.

The MAN retarder ECU emulator sends signals to the vehicle’s ECU indicating that the retarder is functioning properly, and your faulty retarder unit is perceived by the vehicle’s ECU as undamaged. Save money and time with the MAN Retarder ECU emulator, which you can use to avoid the cost of repairing a faulty retarder and keep your vehicle running smoothly.

After building the emulator

• Your cruise control works.
• The automatic transmission starts smoothly.
• Retarder errors on the display are corrected.
• The fault lights go out.

Compatible models:

• Man TGX
• Man TGS