RX - 2nd Gen (2004-2009) Discussion topics related to the 2004 -2009 RX330, RX350 and RX400H models

Headlight assembly replacement - reliable source? 2008 RX-400h

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Old 10-12-23, 07:33 PM
  #16  
zeppo
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Originally Posted by tomr51
ballast is only for the one bulb. it is mounted at the bottom of the headlight assy. if you get condensation in the assy, the moisture seeps into the ballast, causes corrosion and stuffs it
Hmmm, good to know. Thanks. So if I understand you right, the ballast only affects the HID lowbeam headlight? (the one I need to replace).

I've never noticed any visible condensation in the headlight assembly, but then again, the plastic covers have yellowed and might make it harder to notice.
Old 10-12-23, 07:36 PM
  #17  
tomr51
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Yes the ballast is for the low beam
Old 10-13-23, 06:53 AM
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zeppo
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So frustrating not knowing if the ballast is the problem before removal. I'll have to have a plan for buying a ballast if I want to just replace the bulb. If I were to replace the whole assembly, it really would look odd to replace just the drivers side, and I hate the idea that the assembly replacements may not hold up well (that's why I was leaning towards keeping the originals).

Old 10-13-23, 05:44 PM
  #19  
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you can swap the left and right globes to confirm if it is the globe without removing the headlight assy. do a search on this forum or google if the ballast is faulty buy a 2nd hand denso unit. do not buy cheap chinese.
Old 10-13-23, 06:27 PM
  #20  
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Originally Posted by zeppo
I have a 2008 RX400h that I bought around 2015. One headlight is out. Both housings are yellowed so I'll just replace the whole thing on both sides. I believe these are the original factory. I know it has AFS, and in the manual the it shows the low beam headlight bulbs are halogen.

I'll pay a neighbor mechanic with a lift put them in when he replaces the windshield wiper pump. I know nothing about this stuff.

Is there a recommended brand I should buy or source I should buy from (or avoid! )? A guy that works at AutoZone suggested looking on Amazon.

Thanks,
zeppo
I got one for my 2005 RX330 with HID and AFS from Carid.com.
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