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Volkswagen Golf Mk7 Service & Repair Manual: Painting parking aid sensor

To avoid malfunctions in the Volkswagen Golf Mk7 parking aid sensors, this page gives the critical figure: maximum layer thickness 125 µm for new parts, with a layer-depth measurement essential after every paint application.

To avoid malfunctions in the parking aid sensor, always observe the following when painting:
Painting new parts
  Maximum layer thickness 125 µm; a measurement of layer depth is absolutely essential following application of the paint
  Maximum hardening temperature 1 hour at 90°C
Painting used parts
  Remove old finish (sand) only as far as the primer
  Minimum layer depth of 5-10 µm must remain.
  Maximum layer thickness 125 µm; a measurement of layer depth is absolutely essential following application of the paint
  Maximum hardening temperature 1 hour at 90°C
Electrical conductivity
  Do not allow paint or paint mist to enter connector; connector pin must continue to provide electrical contact after painting.
Cleaning
  Immersion in cleaning solutions without previous masking of the connector pins is prohibited.
Functional check
  Connect vehicle diagnostic tester, and check proper operation → Electrical system, General information; Rep. gr.97.
 

Painting parking aid sensor

Paintwork repair structure and layer depth
1 -  Primed new part with replacement part primer: 2-10 µm
2 -  Surfacer: 30 - 40 µm
3 -  Unicolour base coat: 10 - 20 µm
4 -  Base coat metallic/pearl effect: 20 - 25 µm
5 -  Clear coat: 35 - 50 µm
 

Painting parking aid sensor

Painting area
1 -  Only the front and side faces of the sensor membrane are to be painted. The painting area ranges from a minimum 3 mm to a maximum 4 mm from the front face of the membrane towards the rear.
2 -  No paint is permitted in this area.
 

Painting parking aid sensor

    Questions & answers

    Painting parking aid sensor — Volkswagen Golf Mk7

    What paint thickness rules apply to Golf Mk7 parking sensors?
    New parts: maximum total layer thickness including the sensor housing. Repaint: only add primer, base coat and clear coat — do not apply filler or surfacer directly on the sensor.
    Can thick paint on the Golf Mk7 parking sensors cause malfunctions?
    Yes. Excessive paint build-up dampens the ultrasonic signal and causes false readings or complete failure of ParkPilot.
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