Do they charge to retest, if the car was tested and didn't pass?

Yes. Oh someone already answered your question... they're great and quick.

Hi Joyce, good afternoon. Yes, we charge a nominal fee of $10 for retest of 2000 and newer model year vehicles. Best regards,

This is an honest "Star Smog Only" shop doing great work for so many satisfied clients. They're doing it right the first time, so they have no time to rip you off like all those other guys that made you retest.