AVOIR rates the 1991 Pontiac Sunbird Sedan's reliability 88/100 — excellent — from NHTSA recall counts, complaint density, and multi-year defect trends. Its overall AVOIR ownership score is 77/100 (Good).
AVOIR scores the 1991 Pontiac Sunbird Sedan's longevity 81/100 (excellent), estimated from high-mileage survival data and resale-panel evidence of how far these vehicles actually run.
AVOIR scores the 1991 Pontiac Sunbird Sedan on maintenance 90/100 and depreciation 60/100 — higher is better (lower real cost) — plus fuel, insurance and resale in the full breakdown above.
AVOIR scores every vehicle across 7 ownership factors using EPA fuel-economy data, NHTSA safety & complaints, IIHS ratings, and a proprietary used-market resale panel.