Do I need to replace the right headlight too?

No — this is a single left-side assembly. You can replace one side or both, depending on your needs. If you want a matched pair, order the right side separately.

Will this bolt straight in without wiring changes?

Yes. The assembly uses factory mounting points and connects to the existing wiring harness with no modifications needed. Install time is minimal with basic hand tools.

What's the difference between this black housing and the stock clear lens?

The black housing gives a darker, more modern look while maintaining the same beam output and brightness. It's purely a styling choice — light output and performance stay stock-spec.