Pre-purchase inspection checklist — 2018 Grand Design Momentum
The 2018 Grand Design Momentum is known for issues with refrigerator wiring and LP gas pressure. Structural complaints also exist, indicating potential problems. Perform thorough checks on these areas, focusing on safety and durability, before purchasing.
Known issues to inspect
Fridge wire not secure
How to check: Inspect refrigerator wiring, ensure no loose or touching wires.
LP regulator failure
How to check: Examine LP regulator, check for excessive wear or damage.
Structural weakness
How to check: Inspect seams and joints for stability and wear.
Suspension complaints
How to check: Look for sagging or uneven stance, check shocks.
Test-drive walkthrough
- 01
Cold start
What to check: Verify electrical system functions without issue.
Red flag: Tripped electrical breakers or sparks
- 02
Initial acceleration
What to check: Listen for unusual suspension noises or instability.
Red flag: Clunking or shuddering sounds
- 03
Low-speed maneuver
What to check: Ensure locks and latches operate smoothly.
Red flag: Sticking or refusing to lock latches
- 04
Constant speed cruising
What to check: Monitor for gas smell from HVAC system.
Red flag: Strong gas odor in cabin
- 05
Final parking
What to check: Check structural integrity during final stop.
Red flag: Seams or frames appear damaged
Questions for the seller
Use this exact phrasing.
- Has the fridge wiring been secured?
- Are there any gas system repairs?
- Have there been any structural repairs?
- What maintenance has been performed?
- Are there any suspension upgrades?
Documents to request
Don't sign anything until you have these.
- Maintenance records
- Recall repair proof
- Vehicle history report
- Warranty information
- Ownership documents
Generated by gpt-4o on 8/24/2026. Grounded in the NHTSA recall corpus and owner-complaint patterns for the 2018 Grand Design Momentum.