Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 4 complaints on file for the 1978 Pontiac Bonneville — 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.
4
NHTSA complaints
2
Recalls
0
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
| Component | Complaints | Share | vs prior year |
|---|---|---|---|
| Tires & Wheels | 2 | 50% | new |
| Speed Control | 1 | 25% | new |
| Transmission | 1 | 25% | new |
2 NHTSA recall campaigns on file. Recall repairs are free at franchised dealers.
Defect
THE HUB PORTION OF THE FAN BLADE ASSEMBLY COULD CRACK DUE TO HIGH STRESS LEVELS GENERATED DURING ENGINE OPERATING CONDITIONS. EVENTUALLY, THE BLADE COULD BREAK APART AT THE HUB AND BLADE PIECES COULD BE PROPELLED INTO THE ENGINE. IF THE HOOD IS OPEN WHILE THE ENGINE IS RUNNING, THE FRAGMENTS WOULD BE FREE TO FLY FROM THE VEHICLE.
Remedy
DEALER WILL REPLACE THE FAN BLADE ASSEMBLY WITHOUT CHARGE TO OWNER.
Defect
THE REAR WHEEL MOUNTING BOLTS ON THE AFFECTED VEHICLES, ARE BRITTLE AND THEREFORE MAY FRACTURE. THIS BRITTLENESS IS DUE TO IMPROPER HEAT TREATMENT DURING MANUFACTURE. IF THE BOLTS BREAK, THE TIRE AND WHEEL ASSEMBLY MAY SEPARATE FROM THE VEHICLE.
Remedy
DEALER WILL INSPECT AND, IF NECESSARY, WILL REPLACE DEFECTIVE BOLTS ON ALL AXLES AND THE TEN REAR AXLE WHEEL MOUNTING BOLTS, FREE OF CHARGE.
Representative excerpts, cleaned of personal information. These are consumer statements, not verified defects.
“THE FIRESTONE FR721 P215/75R15 MS TIRES ON THE VEHICLE EXPERIENCED OVER NINE OCCASIONS OF TIRE DEFECTS, MOST OF WHICH WERE TREAD SEPARATIONS, ALL FAILURES OCCURRED BETWEEN THE MILEAGES OF 42,000 TO 94,638 MILES. *MJS”
The record is thin — 4 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 2 recalls should be verified as completed.
Yes — NHTSA lists 2 recall campaigns affecting the 1978 Pontiac Bonneville. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
Based on complaint rates and open investigations, the Bonneville years to avoid are 1998, 1995, 2000, 1997, 1993, 1996, 2001, 1999, 1992, 1994, 2002, 2003, 1990, 2004, 2005, 1989. The cleanest record among Bonneville years belongs to 1983.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.