When Adam-12 pulls over the brown station wagon for suspected robbery involvement, the exterior changes from a sunny day to a dark environment. More than likely due to filming the scene on a set.
When Reed and Malloy pull over the man who failed to yield to the pedestrian in the crosswalk, they follow him through a right turn in front of a business called the "Pacific Ballet Theater," but when they make the stop, the same business can be seen in the near background.
When the two boys who were rescued from the lake are given CPR, the outdated Holger Nielsen method is used. By 1974, the LAPD should have been using mouth-to-mouth resuscitation.
Reed runs to the water to save the two boys in the lake discarding his equipment belt en route. No officer would simply toss his belt along with his weapon and ammunition like that! He would take it off and hand it to Malloy (who did retrieve it after the female reporting the overturned boat passed by) temporary custody or, time permitting, secure it in the vehicle preferably in the trunk (out of sight, harder to break into). Point is: no weapon is ever left unattended.
Reed states that his body is sunburned, the tops of his feet most severely affected. When he is soaking his feet in the police station locker room, his exposed lower legs and the top of his right foot are shown. There is no noticeable redness or swelling to any of those exposed areas to indicate a sunburn, let alone as severe as he has stated.
The front end damage to the blue car involved in the car fire is wrong in comparison to the rear end damage to the tan car on fire. Plus, the damage is quite old revealing rust.
When they pull over the suspected robber, Reed doesn't identify the year and make of the vehicle (73 Ford) he simply says "stopping a brown station wagon"