Headlight Lens replacement

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by JoeM(GA), Oct 3, 2015.

  1. JoeM(GA)

    JoeM(GA) Member

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    Well, after 5 years my lens are yellowed and cracking enough to allow moisture to get inside. I have polished the yellow out several times but now you can hear the plastic crackling when you try to put any small amount of pressure on it. I've looked and searched here for how to get to the bolts holding down the lamps. Hopefully you can just loosen the front bumper skin enough to work under it? Has anyone done it yet? Any pointers or ideas
    would be great, winter is coming quick and I'm gonna need those nice clear lens to see on the way to work and back.
     
  2. xliderider

    xliderider Senior Member

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    Do you use inexpensive HIDs?

    Some say cheap HID bulbs do not use Quartz capsules that cut down on UV light emission that causes the yellowing effect of the polycarbonate headlight lens.

    Or is your problem due to actual sun exposure?
     
  3. JoeM(GA)

    JoeM(GA) Member

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    no,nothing other than the standard bulb. I'm sure it is from sun exposure
     
  4. orenji

    orenji Senior Member

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    Front bumper removal is easy and takes 15 minutes if you are slow.....sun is the biggest reason for yellowed headlights. This happens to all new vehicles, since the days of glass lens have gone away. I still have a 92 Lexus with glass lens and they still look new. I wish they would go back to them. On a separate note, why don't rear tail lights that are wrapped in clear lens don't have the same issue of yellowing?
     
  5. xliderider

    xliderider Senior Member

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    Have you sourced the headlight lenses/covers and butyl adhesive?

    Once you get them, it's pretty easy to get the bumper cover off, or loosen the top of the cover and tilt it forward to access the bolts holding the headlight assembly in.

    Then you bake the headlights to soften the adhesive holding the covers on and pry them off carefully.
     
  6. JoeM(GA)

    JoeM(GA) Member

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    I had already bought complete LH & RH units, wasn't going to try to take them apart.
    Removing the bumper cover is what I wasn't sure about how to do.
     
  7. xliderider

    xliderider Senior Member

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    JoeM(GA) and Mendel Leisk like this.
  8. JoeM(GA)

    JoeM(GA) Member

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    Thank you Sir!
    That's what I was after, soon as I can I'll be all over this.
     
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