Officers Nelson and Linahan bring in two juveniles that had been hitchhiking. In reality, they would have been turned over to LAPD and not brought in to the CHP station.
When the bad guys ambush Ponch as he's entering his apartment and starts fighting, you can see that they're using a stunt double for the fight. He doesn't look anything like Ponch and has on a terrible wig.
It has been well established that Ponch is an expert in karate, yet when Ponch fights with Jake Carr in his (Ponch's) apartment, Ponch doesn't use any karate moves or stances. Instead, it looks like a street brawl, and an undisciplined one at that. Ponch has plenty of opportunities to use various objects as weapons (Carr is armed with a pistol), as there are lamps lying around, yet the only thing he used as a weapon is a framed lithograph, which is probably the least effective found-object weapon in the entire apartment.
Lori says she flew over 300,000 miles. She presumably was supposed to say 3,000 miles instead.