- The problem
- Air system blockage in the air dryer occurs degrading the moisture removing capabilities of the dryer when the vehicle is operated in a cold environment and moisture accumulates and freezes in the air dryer or in the line between the dryer and the air system reservoir. The air dryer can become overpressurized causing the air dryer cartridge to separate from the mounting base.
- The risk
- If the air dryer separates from the base, the cartridge can separate sufficiently enough to cause personal injury or property damage.
- The fix
- Dealers will equip air systems with a pressure relief valve to be located between the compressor and the air dryer. This pressure relief valve is intended to vent if excessive pressure develops in the air dryer.
Vehicle safety record
1994 Mack MR Problems, complaints & recalls
No owner complaints about the 1994 Mack MR have been filed with NHTSA. It is covered by 1 recall, the latest in June 1995 for the hoses, lines / piping, and fittings.
NHTSA data checked
AFar fewer problems than a typical MR year, for its age
- Complaints
- 0
- Recalls
- 1
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1994 Mack MR recalls 1
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
What owners say
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No complaints about the 1994 Mack MR 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 MR: every year compared
All MR years1994 Mack MR vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1994 Mack MR | 0 | 1 | A | |
| 1994 Mack Mack | 1 | 0 | A | Compare |
| 1994 Mack CH | 1 | 1 | A | Compare |
More sales usually means more complaints, so compare similar vehicles of the same year. The grade compares each vehicle with its own model's other years.
Questions about the 1994 Mack MR
Does the 1994 Mack MR have any recalls?
Yes - NHTSA lists 1 recall for the 1994 Mack MR: hoses, lines / piping, and fittings (June 1995). 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 1994 Mack MR had?
None have been filed with NHTSA so far.
Is the 1994 Mack MR a reliable vehicle?
Its Safety Index is 80 out of 100 (grade A: far fewer problems than a typical Mack MR 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 1994 Mack MR 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