I haven't used aftermarket versions much; I think, one set, I installed, was by the company "eagle eyes" and they seem, ok quality but defintiely, not oem. Oem, from what I have seen; are Bosch or Hella. I think, you can buy those brands, as a oem part without having to buy them from your VW dealer.

After installing the cheap aftermarket types; I would almost, rather restore a used set of genuine vw assembly, if broken or use a 3M headlight restore kit, for dull or sun damaged clear plastics. I think, many times; oem, is better then aftermarket, again, feedback might prove otherwise.

Brighter bulbs, do seem to make a difference; hopefully, someone can chime in and provide recommendations, for better bulbs and a good set of head light assemblies.

Hella:

2007 VW New Beetle headlight assembly Hella at DuckDuckGo

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Bosch:

2007 VW New Beetle headlight assembly Bosch at DuckDuckGo

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RockAuto: TYC, DEPO, etc.

2007 VOLKSWAGEN BEETLE 2.5L L5 Headlamp Assembly | Shop Now at RockAuto

Body & Lamp Assembly Parts and More for Your 2007 VOLKSWAGEN BEETLE at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

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I 3M'd mine, less than an hour of hand work for an amazing difference!

 

I cleaned mine up and buffed them out with some old plastic x I had from years ago. They work and look better. Does anyone make some dark or tinted ones? I bought some for my expedition a couple years ago and they work great. I can't find anything similar for my 2001 bug