Installing the rain-light-solar-condensation sensor

WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.

Check

NOTE: RISK OF DAMAGE
Damage to silicone surface.
A damaged silicone surface can lead to malfunctioning of the rain-light-solar-condensation sensor.

Do not tap or damage the silicone-coated surface on the rain-light-solar-condensation sensor.
After loosening lock, wait approx. 30 min. at 20°C for silicone surface to relax.

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Check the silicone surface (1) and sensor (2) for damage.
Result

» Sensor (2) is damaged.

Measure
- Replace rain-light-solar-condensation sensor.
Result

» Silicone surface is damaged (1).

Measure
- Replace the gel pad.
Replacing the gel pad for rain-light-solar-condensation sensors

Result

» Silicone surface (1) and sensor (2) do not show signs of damage.

Measure
- Install the rain-light-solar-condensation sensor.
Carefully clean windshield in contact area (1) of rain-light-solar-condensation sensor.

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Guide in the rain-light-solar-condensation sensor (2) in the holder and press on the center of the retaining springs (1).
To lock in place, press down the retaining springs (1) on each side one after the other.

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Check

Check contact surface externally for air pockets.
Visible shades (1) are not air pockets, rather the optical element of the rain-light-solar-condensation sensor (2). The shades (1) do not represent a functional limitation.

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Result

» Contact surface exhibits air pockets.

Measure
- Remove rain-light-solar-condensation sensor and reinstall it.
Connect connectors (1) and lock.

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Follow-up work

Refer to INSTALLING INTERIOR REARVIEW MIRROR .
Refer to INSTALLING THE COVERS FOR THE INTERIOR MIRRORS .