A4 (B7 Platform) Discussion Discussion forum for the B7 Audi A4 produced from 2005-2008.5

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Old Feb 16, 2026 | 07:43 AM
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Can anyone tell me what this is im still trying to find out what part to replace to get my automatic lights to turn on when it's dark it doesn't work it doesn't turn on when it is dark my wipers works fine but not my lights



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Old Feb 17, 2026 | 04:11 AM
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https://audi.oempartsonline.com/oem-...-8p0907539a4pk

Sunload Sensor - Audi (8P0-907-539-A-4PK)
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Old Feb 17, 2026 | 04:12 AM
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Is that the unit that tells your car when to turn on the automatic lights
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Old Feb 17, 2026 | 04:28 AM
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https://www.fcpeuro.com/products/aud...-8p0907539a4pk

Based on description from this other link, YES.
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Old Feb 21, 2026 | 09:53 PM
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I know on my A6 the Sun load sensor only controls the fan speeds for the hvac system, auto headlights are in the rain sensor behind the rear view mirror.
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