1999 Mack MR problems

Verdict · NHTSA data

Limited data — recalls on file

NHTSA has just one complaint on file for the 1999 Mack MR — too few to judge reliability from owner reports alone — but 5 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work. Reports tied to this model year include one death, per the complaint records themselves.

NHTSA complaints

Recalls

Investigations

Crash-involved

Fires reported

Injuries

Deaths

—

NCAP overall

How does 1999 compare to other MR years?

MR NHTSA complaints by model year, 1999 highlighted. Red bars are years to avoid.

See all MR years to avoid →

What are the most common 1999 Mack MR problems?

Component	Complaints	Share	vs prior year
Other	1	100%	new

Does the 1999 Mack MR have recalls?

5 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.

04V159000Fuel SystemApril 7, 2004 · 317 units

Defect

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.

Consequence

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.

Remedy

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.

01V044107SteeringMarch 14, 2001 · 1,484 units

Defect

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.

Consequence

IF THIS CONDITION OCCURS, THE DRIVER CAN LOSE PARTIAL CONTROL OF THE RIGHT FRONT WHEEL, POSSIBLY RESULTING IN A CRASH.

Remedy

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.

01V044207SteeringMarch 14, 2001 · 4,247 units

Defect

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.

Consequence

IF THIS CONDITION OCCURS, THE DRIVER CAN LOSE PARTIAL CONTROL OF THE RIGHT FRONT WHEEL, POSSIBLY RESULTING IN A CRASH.

Remedy

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.

00V230003Speed ControlOctober 4, 2000 · 45,866 units

Defect

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.

Consequence

THIS CONDITION COULD CAUSE THE PEDAL TO GO TO FULL THROTTLE IF BOTH RETURN SPRINGS BREAK, INCREASING THE RISK OF A CRASH.

Remedy

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.

00V232009BrakesSeptember 13, 2000 · 651 units

Defect

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.

Consequence

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.

Remedy

DEALERS WILL REPLACE THE ABS ECU.

Consumer complaints filed with NHTSA

Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.

“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”
Complaint filed with NHTSA · Other · January 8, 2004

1999 Mack MR — common questions

Is the 1999 Mack MR reliable?

The record is thin — 1 NHTSA complaint — so owner-report data can't strongly confirm reliability either way, though 5 recalls should be verified as completed.

Does the 1999 Mack MR have recalls?

Yes — NHTSA lists 5 recall campaigns affecting the 1999 Mack MR. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.

Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.

Compiled by Sharon Ben-Moshe, Founder.

How does 1999 compare to other MR years?

What are the most common 1999 Mack MR problems?

Does the 1999 Mack MR have recalls?

Consumer complaints filed with NHTSA

1999 Mack MR — common questions

Is the 1999 Mack MR reliable?

Does the 1999 Mack MR have recalls?

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