- The problem
- Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.
- The risk
- In the event the primary throttle return fails, failure of the secondary throttle return system would not provide protection against loss of throttle control.
- The fix
- A new production secondary throttle return system configuration will be installed.
Vehicle safety record
1989 Mack DMM Problems, complaints & recalls
No owner complaints about the 1989 Mack DMM have been filed with NHTSA. It is covered by 2 recalls, the latest in February 1994 for the vehicle speed control.
NHTSA data checked
DMore problems than a typical DMM year, for its age
- Complaints
- 0
- Recalls
- 2
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1989 Mack DMM recalls 2
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
- The problem
- A tolerance mismatch in the crank assembly of the bosch windshield wiper motor could cause instantaneous separation of the crank from the linkage assembly in the left hand control arm assembly; this would make the system inoperable.
- The risk
- Wiper failure during vehicle operation could reduce driver's ability to see the road, and creates a potential for an accident.
- The fix
- REPLACE LEFT HAND CONTROL ARM LINKAGE ASSEMBLY.
What owners say
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No complaints about the 1989 Mack DMM yet
No owner has filed a complaint about this vehicle with NHTSA. If yours has a problem, share it here and report it to NHTSA.
Mack DMM: every year compared
All DMM yearsQuestions about the 1989 Mack DMM
Does the 1989 Mack DMM have any recalls?
Yes - NHTSA lists 2 recalls for the 1989 Mack DMM: vehicle speed control (February 1994); linkages (March 1990). Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
How many complaints has the 1989 Mack DMM had?
None have been filed with NHTSA so far.
Is the 1989 Mack DMM a reliable vehicle?
Its Safety Index is 26 out of 100 (grade D: more problems than a typical Mack DMM year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
What should I do if my 1989 Mack DMM has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
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