Pre-purchase inspection checklist — 1998 Pontiac Bonneville
The 1998 Pontiac Bonneville has notable issues with fuel leaks, electrical problems, and exterior lighting compliance. Engine complaints are high, mainly due to the fuel pressure regulator recall. Despite some issues, with careful inspection and repair history verification, it can still be a dependable vehicle.
Known issues to inspect
Fuel pressure regulator leaks
How to check: Inspect for fuel leaks near the intake manifold.
Frequent electrical system failures
How to check: Check all electrical components for proper function.
Non-compliant aftermarket lighting
How to check: Confirm the presence of amber side reflectors.
Test-drive walkthrough
- 01
Cold start
What to check: Listen for unusual engine noises at start-up.
Red flag: Knocking or loud ticks
- 02
Idling
What to check: Check for dashboard warning lights.
Red flag: Persistent warning lights
- 03
Low-speed maneuvering
What to check: Test all indicator lights and electrical controls.
Red flag: Non-functioning lights
- 04
Highway acceleration
What to check: Monitor for hesitation or misfires.
Red flag: Stalling or severe hesitation
- 05
Braking
What to check: Feel for smooth braking performance.
Red flag: Spongy or ineffective brakes
Questions for the seller
Use this exact phrasing.
- Have the fuel leaks been addressed?
- Are the headlights original or aftermarket?
- Any frequent electrical issues?
- How often has the car been serviced?
- Have there been any engine repairs?
Documents to request
Don't sign anything until you have these.
- Vehicle service history
- Recall repair documentation
- Title and registration
- Previous owner's contact
- Current mechanic's inspection report
Generated by gpt-4o on 8/18/2026. Grounded in the NHTSA recall corpus and owner-complaint patterns for the 1998 Pontiac Bonneville.