Both Low beams won’t turn on

Try new bulbs and see if they turn on. My Prius C burnt one of the low beams in less than a year.

 

A really surprising number of drivers don't notice one headlight is burnt out until the second one also burns out.

So don't feel bad, it happens a lot.

Also, short bulb lifetime length can be a symptom of incorrect installation, either getting a fingerprint on the glass bulb or not seating the flange all the way... but it also just naturally happens with high-output variants of the bulbs.

 

Cheap bulbs burn out quickly. Plus you don't miss them until their (both) gone.

 

The other kind of bulbs that burn out quickly is expensive ones.

The ones that are sold as premium, extra bright, are made that way by deliberately trading lifespan for brightness. So they're expensive, and they don't last long. And at the auto parts places, they are usually the ones hanging right at eye level saying "buy me! buy me! buy me!".

The standard ones, with standard brightness and non-premium pricing, are probably hanging on the pegs down by your ankles, where the shop hopes you won't look.

 

Buy the Sylvania LED ones, they illuminate the way good enough, and they are LED you know, they don't get hot, they are efficient.

 

Should be h11 for low and 9005 for high. Cheap is less than $17 from no names on ebay or amazon. Even Philips has been poor lately.