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Autodata Technical Issue 4 - Recurring Headlamp Condensation in 2012 Volvo V40

Autodata Technical Issue 4 - Recurring Headlamp Condensation in 2012 Volvo V40

27 April 2017

Each month the Autodata team answers a common technical question and provides a printable document with technical diagrams to download and keep, exclusively for IGA members.

Issue 4 investigates returning headlamp condensation in a Volvo V40.

Q. A customer of ours had a problem on their 2012 Volvo V40. The headlamps have excessive condensation in them. We have visually checked the headlamps for damage and thoroughly dried them out, but the condensation soon returns. Have you come across this problem before?

A. This problem is due to a lack of ventilation holes in the headlamps. To complete this repair a ventilation membrane, available from a Volvo parts department, will be required.

Remove the headlamp (see figure 1.1), then remove the headlamp rear cover. Make two ventilation holes in the headlamp rear cover (see figure 1.2) with a 13mm drill bit, ensuring 17mm clearance between each hole (see figure 1.3). Ensure all plastic swarf is removed from the ventilation holes.


Thoroughly clean the area around the ventilation holes and fit ventilation membrane, ensuring ventilation holes are covered. Repeat the procedure on the opposite headlamp.

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Autodata Technical PDFs are also be available to download or print at any time from the Members Area of the IGA website.

Take advantage of our exclusive member offer for Autodata online and combine your trade association membership with Autodata Diagnostic & Repair - call our member helpline on 0845 305 4230 for more information.