Continuity mistake: When the cop pulls over the mob's limo, he parks his motorcycle perpendicular to the vehicle, but in the next shot it is parked facing in the same direction as the limo.
Visible crew/equipment: After Callahan removes the bomb from his mailbox, he looks up at a man on the nearby stairs. As a car drives by on the street, the lights from it cast the shadow of the boom operator onto the wall.
Visible crew/equipment: After the pimp is stopped by the policeman on the motorcycle and shot, the camera pulls back showing the pimp's arm lolling through the car window and the reflection of the camera crew moving about on the back, driver's side wing.
Continuity mistake: In the car with Callahan, after picking up the bomb, Briggs puts his glasses on twice.
Revealing mistake: A metal ramp is visible on the front bumper of the 1972 Ford Galaxie sedan when it rams the motorcycle head on.
Continuity mistake: When Callahan is in the car with Lieutenant Briggs after they pick up the bomb they drive by the 76 service station three times in about 30 seconds.
Audio problem: When Callahan gets out of his car to stake out the robbery, he shuts the car door, and the sound of the door closing is heard after the door is shut.
Continuity mistake: When Callahan jumps onto the hood of Palancio's car after the police raid, he is facing the rear of the car, grabbing the hood near the windshield. A few seconds later, he is seen sprawled across the hood, facing the front of the car, and then seconds later he is back in his original position.
Visible crew/equipment: When the corrupt copper pulls over the pimp, there is one shot where the camera is zoomed into his glasses. You can see the camera and 2 crewmembers reflected in them.
Character mistake: When one of the interviewers asks Lt. Briggs for a comment after the swimming pool massacre, all of the interviewers stop. At this point a cameraman turns around and a man with a white hat who is holding the camera lens steps backwards and almost falls over.
Continuity mistake: When Harry is being chased down the steep winding street he hits a car with the driver's side of his car. In one subsequent shot, the damage is shown to the passenger side instead.
Visible crew/equipment: When Clint Eastwood drives the car head on at the motorcycle cop sending him flying, you can see in slow motion the scoop under the front of the car with a small dolly wheel attached.
Visible crew/equipment: When Harry is running up the steps to enter the aircraft carrier, you can see a camera and crewman in a white hat below, just above the wood wall.
Continuity mistake: When one of the hijackers says "Now close that door!" to Harry in the aeroplane, he is pointing his gun directly at Harry, but in the next shot he is pointing his gun downwards.
Continuity mistake: When the pimp is being followed on the Golden Gate Bridge by one of the motorcycle cops, the shot starts near the center span but in the next couple of shots, they are at the beginning of the bridge.
Continuity mistake: The cop walks up the hill to the pool party scene with 2 pipes and the bomb satchel in his hands. When he gets there the pipes magically turn into a machine gun.
Revealing mistake: Before the pimp is shot dead by the police officer, a circular discoloration is visible on the actor's neck, exactly where he is about to be shot.
Continuity mistake: When Early Smith is confronted by a thug with a shotgun in the store, the number on the till is "3.21", but a few shots later changes to "1.79".
Continuity mistake: During the supermarket scene, one of the thugs points his shotgun at Early Smith and tells him to "Freeze". At this point you can see the till is open, but after a quick cut to Harry, we return to the cash desk and the till is now closed.