Car Problem DataNHTSA records

1991 Mack U

Routine

No owner complaints are on file for this vehicle. It has been recalled 1 time.

1 safety recall

Part 573 reports
Vehicle Speed Control94V032000
Filed Feb 15, 199439,777 vehiclesMack Trucks, Incorporated

Defect. 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.

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.

Remedy. A NEW PRODUCTION SECONDARY THROTTLE RETURN SYSTEM CONFIGURATION WILL BE INSTALLED.

Across model years

Worst on record: 1992
YearComplaintsRecallsFiresDeathsAssessment
19920100Routine
1991 — this page0100Routine
19900100Routine

Compare every U year →

Other Mack models

All Mack models →
Mack 16Anthem (an) 11Granite (gr) 9CXU612 7GU 6CH 6Cxu 5CH600 5CV 4CL 4

Reading this record

No unusual pattern of severe incidents in the complaint record.

Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.

Recall repairs are free for as long as the recall stands. Check whether a specific car still has open work at NHTSA's VIN lookup.

Most recent recall on file: Feb 15, 1994. Source: NHTSA Office of Defects Investigation.