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fabian_lang1

Quest Headlight Range Control Issue

Having issues with the headlight range control system on my 2005 Nissan Quest with a gasoline engine. Error stored, warning light on, and low beams are misadjusted. I've checked the headlight switch and for obstructions, but no luck. Any ideas?

Summary of the thread

The headlight range control system on a 2005 Nissan Quest is malfunctioning, with an error stored, a warning light on, and misadjusted low beams. The issue may be due to a faulty servomotor within the headlight assembly, as indicated by the whirring sound during startup. Although the servomotor is typically a sealed unit, requiring a full headlight assembly replacement, a workshop diagnosis confirmed the servomotor as the problem, leading to a repair cost of 1040€.

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4 comment(s)

marc_koenig1

Sounds like a real pain. That auto-leveling system can be finicky. Does it try to adjust when you first start the van? Sometimes you can hear the little motors whirring. Also, have you checked the connections to the headlight units themselves? A loose plug can cause all sorts of weirdness.

fabian_lang1 (community.author)

Yes, it attempts a brief adjustment with a faint whirring sound on startup. Connectors at the headlight units seem secure and free of corrosion. Could the servomotor itself be the problem, and can it be repaired separately, or does it require a whole headlight assembly replacement?

marc_koenig1

That whirring but still malfunctioning definitely points to the servomotor inside the headlight. Unfortunately, they're usually sealed units. While maybe you could find a replacement motor and DIY it, honestly, it's a huge hassle and you risk damaging the headlight further. Given the error codes and the adjustment issue, I'd say bite the bullet and take it to a trusted workshop. They can properly diagnose it and confirm, but it really sounds like the servomotor. They'll have the right tools and knowledge to replace the whole headlight assembly if needed.

fabian_lang1 (community.author)

Took it to a workshop, and it was indeed the servomotor within the headlight assembly. Repair cost was 1040€.

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NISSAN

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QUEST