Rain/Light Recognition Sensor, Servicing (Manufacturer TRW)

Rain/Light Recognition Sensor, Servicing (Manufacturer TRW)

Only TRW can replace the housing and optical unit if the optical unit (coupling cushion) is damaged.

There are different housings for the rain sensors because there are multiple manufacturers.

A replacement rain sensor housing and optical unit are always delivered with mounting clips. Remove these clips if they are not needed.

Perform the following

- Remove the rain sensor. Refer to => [ Removal ] Rain/Light Recognition Sensor (G397).

Manufacturer TRW


The rain sensor electronics may be damaged.

Be careful not to insert the screwdriver all the way through the housing up to the rain sensor electronics.

Do not touch the rain sensor electronics.

- Press the tab - 2 - on both sides and separate the upper section - 1 - from the lower section - 3 -.






- Remove the rain sensor electronics - 4 - from the old lower section and install the new electronics the exact same way.


Do not touch the optical unit.

Remove the protective cover from the rain sensor just before installing it.

- Assemble the new upper section with optical unit and protective cover and the lower section.

- Pry the clip and bracket - 1 - out of the rain sensor housing - 2 - with a screwdriver.






- Install the rain sensor. Refer to => [ Installation ] Rain/Light Recognition Sensor (G397).