Defect
TOTAL CAPACITY OF AIR BRAKE RESERVOIR MAY BE SLIGHTLY LESS THAN REQUIRED BY FMVSS 121.
Consequence
TRUCKS WOULD NOT COMPLY WITH STANDARD.
Remedy
REPAIR TO ASSURE CORRECT TOTAL CAPACITY OF AIR BRAKE RESERVOIRS.
1988 Mack Ms300p problems
Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 0 complaints on file for the 1988 Mack Ms300p — too few to judge reliability from owner reports alone — but 2 recall campaigns apply to this year, so any used example should have its VIN checked for completed recall work.
0
NHTSA complaints
2
Recalls
0
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
Does the 1988 Mack Ms300p have recalls?
2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.
Defect
POWER STEERING PUMPS MAY HAVE A RIDGE INSIDE THE ALUMINUM HOUSING WHICH COULD DETACH ITSELF FROM THE HOUSING AND BECOME WEDGED INSIDE THE RELIEF VALVE, KEEPING IT OPEN.
Consequence
THIS COULD RESULT IN SUDDEN LOSS OF ASSISTANCE TO THESTEERING WITH THE POTENTIAL FOR AN ACCIDENT.
Remedy
REPLACE POWER STEERING PUMP.
1988 Mack Ms300p — common questions
Is the 1988 Mack Ms300p reliable?
The record is thin — 0 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.
Does the 1988 Mack Ms300p have recalls?
Yes — NHTSA lists 2 recall campaigns affecting the 1988 Mack Ms300p. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
Related
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.