- The problem
- A deficiency in the routing of the heater duct hose could allow the hose to rest against a terminal post of the accessory relay. Vibration will eventually cause the terminal post to penetrate the hose fabric and short circuit the wire reinforcement and overload the circuit.
- The fix
- Dealer will replace the portion of the existing hose that is closest to the accessory relay with an all-rubber hose.
Visibility & wipers
1978 Mack MR Visibility problems
No owner has filed a complaint about the 1978 Mack MR's visibility & wipers with NHTSA. Windshields, wipers, defrosters, mirrors, backup cameras and glare.
- Complaints
- 0
- Recalls
- 1
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
Visibility recalls for the 1978 Mack MR
Visibility complaints
No complaints about this area yet.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data