1991 Pontiac Bonneville

The 1991 Bonneville shows 29 complaints and 2 recalls, a notable improvement from 1990's 44 complaints, but it marks the calm before a significant escalation—1992 jumps to 132 complaints, 3 investigations, and 24 TSBs, followed by 1995's peak of 257 complaints. While 1991 had one investigation opened, the recall count increased to 2 versus 1990's 1, and TSBs began accumulating at 6 (rising to 35 by 1994 and 61 by 1995), indicating emerging, ongoing engineering issues across the generation. The top complaint categories for 1991—Service Brakes, Hydraulic (6), Seat Belts (4), and Power Train (3)—suggest systemic durability concerns that worsen in subsequent years. Across the full arc, complaints and TSBs climb through the mid-1990s before gradually declining after 2000, suggesting the platform's early-to-mid production years carried the highest defect rates. The 1991 model year falls at the front end of this troubled period, before the spike but after initial complaints have surfaced. Takeaway: This is not an ideal year to purchase—the data shows 1991 sits at the beginning of an escalating defect trend, and the specific brake and seat belt complaints present real safety-relevant risks that intensified through the mid-1990s; a 2003–2005 model would be substantially safer given the 67–28 complaint range and resolved investigations by that point.