Rain/Light Recognition Sensor -G397-, Replacing: Installing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Install in reverse order of removal and note the following:

CAUTION:

There is a risk of damaging the humidity sensor through improper handling.

-- Gently press the grip surfaces -arrows- on the protective cap -2- together and remove from the sensor -1-.

Fig 1: Identifying Protective Cap

Courtesy of AUDI OF AMERICA, LLC

TIP:

To avoid contaminating the silicone pad, remove the protective cap just before installing it.

-- Insert the sensor -4- into the mount -2-.

Fig 2: Identifying Rain/Light Recognition Sensor

Courtesy of AUDI OF AMERICA, LLC

The Rain/Light Recognition Sensor -G397- must not have any embedded objects or bubbles between it and the windshield so that it functions correctly.

-- Press on the clips -1 and 5- until they audibly engage.

-- Connect the connector -3-.

-- After replacing the rain/light recognition sensor it must be coded. Refer to Vehicle Diagnostic Tester.