- The problem
- On certain chassis built with lng engines, the nexgen lng tank's primary and secondary relief valves could fail to open and relieve tank pressure.
- The risk
- This could cause ice buildup on the discharge side of the primary and secondary pressure system allowing the relief system to freeze and become blocked resulting in over pressurization of the lng tanks creating the risk of catastrophic tank rupture which could cause serious injury or death.
- The fix
- Dealers will retrofit the lng tanks with a new primary relief valve pipe away tube and a new ventilated shroud. The recall began april 6, 2004. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3337.
Vehicle safety record
1999 Mack MR Problems, complaints & recalls
Owners have filed 1 complaint about the 1999 Mack MR with NHTSA, most often about the equipment & accessories (1). Those complaints describe 1 death. It is covered by 5 recalls, the latest in April 2004 for the pressure relief devices. For comparison, the 1998 has 0 and the 2000 has 0.
NHTSA data checked
FFar more problems than a typical MR year, for its age
#425 most complained-about 1999 vehicle
- Complaints
- 1
- Recalls
- 5
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 1
Most common 1999 Mack MR problems
Share of all 1 complaints. One complaint can name more than one area. Tap an area for its complaints and recalls.
1999 Mack MR recalls 5
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
- Vehicle description: heavy duty trucks equipped with drag link assemblies containing 24-dl model ball sockets and manufactured by trw. Certain of the tie rod ball-socket bearings have a below-specification case depth and/or hardness, which can lead to premature wear of the socket.
- The risk
- If this condition occurs, the driver can lose partial control of the right front wheel, possibly resulting in a crash.
- The fix
- Dealers will replace the defective drag links. Owner/distributor notification began august 30, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3011 or trw customer service at 1-866-280-3287.
- The problem
- Vehicle description: heavy duty trucks equipped with tie rod assemblies containing 24-dl model ball sockets and manufactured by trw. Certain of the tie rod ball-socket bearings have a below-specification case depth and/or hardness, which can lead to premature wear of the socket.
- The risk
- If this condition occurs, the driver can lose partial control of the right front wheel, possibly resulting in a crash.
- The fix
- Dealers will replace the defective tie rods. Owner notification began july 13, 2001. Owners who take their vehicles to an authorized dealer on an agreed upon service date and do not receive the free remedy within a reasonable time should contact mack at 1-610-709-3011 or trw customer service at 1-866-280-3287.
- The problem
- Vehicle description: class 8 trucks equipped with felsted electronic accelerator pedals. The return springs can break on the accelerator pedals that are equipped with stainless steel or electroplated wire return springs.
- The risk
- This condition could cause the pedal to go to full throttle if both return springs break, increasing the risk of a crash.
- The fix
- Replacement accelerator pedals equipped with return springs manufactured of music wire with one additional coil on each spring and with an organic coating, eliminating electroplating will be installed.
- The problem
- Vehicle description: heavy duty trucks built with bendix air abs with an ec-17 1030r electronic control unit (ecu), there have been reports of unwanted abs activation at low speeds caused by 1) chafed abs wheel speed sensor wires on rotating parts or 2) a damaged component at the wheel end that generates a certain type of erratic sensor signal.
- The risk
- This condition could cause the abs ecu to exhaust the air at the air brake modulators for one or more of the wheels. This could result in extended braking distances and a possible crash.
- The fix
- DEALERS WILL REPLACE THE ABS ECU.
What owners say
Be the first MR owner to share.
Problems or none - your experience is exactly what the next buyer is looking for. Write it now
1 complaints about the 1999 Mack MR
Newest first, as filed with NHTSA by owners.
Foia request info re recalls, defects, like-incidents or claims pertinent to dump truck, firm represent angela calderone, surviving spouse of bruse calderone killed when the safety arm failed while working on aforementioned truck. *La (nar) *cb *jb
Mack MR: every year compared
All MR years1999 Mack MR vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1999 Mack MR | 1 | 5 | F | |
| 1999 Mack Mack | 2 | 0 | A | Compare |
| 1999 Mack CL | 1 | 6 | F | 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 1999 Mack MR
Does the 1999 Mack MR have any recalls?
Yes - NHTSA lists 5 recalls for the 1999 Mack MR: pressure relief devices (April 2004); connection (March 2001); tie rod assembly (March 2001); accelerator pedal (October 2000) and more. Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
What are the most common problems with the 1999 Mack MR?
By the complaints owners filed with NHTSA, the most common problem areas are the equipment & accessories (1).
How many complaints has the 1999 Mack MR had?
1 complaints have been filed with NHTSA, the first on February 23, 2004 and the latest on February 23, 2004. Of these, 0 describe a crash and 0 a fire, and together they report 0 injuries and 1 death.
Is the 1999 Mack MR a reliable vehicle?
Its Safety Index is 13 out of 100 (grade F: far more 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 1999 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