Pre-purchase inspection checklist — 2018 Lexus Is
The 2018 Lexus IS is a reliable used vehicle with minimal user complaints and recalls. However, potential buyers should still carefully inspect the car for specific issues related to the engine, locks, and other unspecified components to ensure a sound purchase.
Known issues to inspect
Unidentified engine issue
How to check: Listen for unusual noises during idling and acceleration.
Latch or lock malfunction
How to check: Inspect all door locks for proper operation.
Unspecified safety concerns
How to check: Check for any unusual dashboard warning lights.
Test-drive walkthrough
- 01
Cold start
What to check: Listen for any unusual engine noises
Red flag: Persistent knocking sounds
- 02
First minute idling
What to check: Look for dashboard warning lights
Red flag: Any persistent warning lights
- 03
Parking lot maneuvers
What to check: Ensure smooth lock/unlock function of doors
Red flag: Door locks not functioning
- 04
Highway acceleration
What to check: Check for smooth power delivery
Red flag: Engine hesitates or stutters
- 05
Braking test
What to check: Feel for smooth, responsive braking
Red flag: Brakes feel spongy or unresponsive
- 06
Turning at speed
What to check: Check for stable and controlled turns
Red flag: Vehicle feels unstable or wobbly
Questions for the seller
Use this exact phrasing.
- Has the engine ever been serviced?
- Any issues with door locks or latches?
- Have you experienced any dashboard warnings?
- What major repairs have you done?
- Can you explain any past accidents?
Documents to request
Don't sign anything until you have these.
- Service history records
- Accident repair invoices
- Title for vehicle
- Warranty information
- Proof of recall repairs
Generated by gpt-4o on 8/19/2026. Grounded in the NHTSA recall corpus and owner-complaint patterns for the 2018 Lexus Is.