Both the left and right assemblies fit perfectly in my 2016 Civic. I've included a before picture of my broken bulb and some after pictures. I was glad I got both right and left, as when I did my test, I realized that the new assembly had clearer, cleaner glass than my old still working assembly (it was yellowing). I replaced both and now my fog lights look brand new.I noticed one of the product detail pictures said “The bulb is provided as a bonus. If it's broken or not working, please replace it with the correct type bulb.” I thought that was rather underhanded. I compared the new bulbs with my old bulbs (even though the glass for the fixture has been shattered out for over a year, the bulb itself was still working fine) and the filament of the my car's original bulbs are clearly thicker than the “bonus” bulbs that came with the fog lights. The original bulbs that came with my Civic are 35 watt Phillips bulbs. The new were 25 watt no brand bulbs. I stuck to my original bulbs for fear the new ones would burn out soon – especially with the disclaimer in the listing.Aside from that oddity, I'm very happy with the fixtures. The appear to be high quality – just like the originals. I'll update this review if I have any issues. Note that for a Civic, you have to completely remove the bumper to change the assembly… it is a bit of a job.