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With the Bosch H5 headlight the lens and the assembly comes as one piece (on US 964:s).
Until recently you had to replace the whole unit but now several places sells the lens by itself ($125-$150) as compared to the whole unit ($225-$295).
However how do I just replace the lens? (As I said the factory installed light fixture comes as just one piece)
Unless you have already bought the lens, you might want to consider "upgrading" to H4's. The total cost (new H4's can be got at $200approx - secondhand H1's are around $320 a pair) then you will need the paintable surrounds etc is around the $400 mark. From this you can gather that I was happy to replace rather than repair my H5's.
I bought my H5's on Ebay for $125 each - Brand New! Some headlights have clips and glue that hold the lens on, others are just glued on. It would be difficult to remove them.
I would replace the entire unit. Actually, I did. I also added the headlight film to protect them.
If you do a search in the archives - someone once did change the glass (IIRC) on an H5 - the post is old - at least over a year and try searching "H4" "H5" and light - see if that helps.
I recently had to replace the H5 "lens assembly" on my '87 due to a rock hit. I purchased the "whole unit" (lens & reflector), and paid about $125 including shipping from EuroWebParts. Check the following link: http://catalog.eautopartscatalog.com...Headlight+Lens
Shipping was faster than I expected, as I guess they had the unit drop-shipped from their supplier. Click on the photo in the provided link to show what you get when you order. No need to take the lens/reflector apart - Just put the bulb into the new unit and go. This was the cheapest place I found, and service was great. No affiliation with the company, just satisfied with the single order I have placed with them to date.
I can't imagine why anyone would want to replace a damaged H5's. In my opinion they are awful. Use this as a good rationalization to buy a pair of H-4's. H-1's, if you can get your hands on a pair (unlikely)
Personally, I didn't want to go through the hassle of painting new trim rings to try and get a matching color when installing H4 replacements. Further, the H5's might not be the most popular but they do the job I need them to do day or night.
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