Recall 18V231 affects 106 2018 Jeep Wrangler vehicles for rear underbody corrosion that can loosen the seat mount. Free repair at any franchised Jeep dealer.
Jeep is recalling 106 2018 Wrangler vehicles because corrosion in the rear under body ladder rail can weaken the rear floor pan and loosen the left rear seat mount. In a crash, the rear seat can detach and increase injury risk; Jeep dealers will complete the recall repair free of charge.
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What's wrong?
The under body ladder rail on the 2018 Jeep Wrangler is a structural reinforcement under the rear floor pan. It helps the rear floor hold its shape and gives the left rear seat mount a solid structure to attach to. In normal use, that rail has corrosion protection so road moisture and salt do not weaken it.
On affected Wranglers, the driver side rear under body ladder rail was built with less corrosion protection than Jeep required. That leaves the metal more exposed. As corrosion develops, the rear floor pan loses strength and the left rear seat mount can become loose because the structure underneath it is weakened.
There is no warning sign before failure. Owners should not rely on a noise, warning light, or visible seat movement to confirm whether their Wrangler is included.
Who's affected?
The same recall names both the rear seat assembly and frame structure, so the scope is component-specific rather than model-wide.
| 2018 Jeep Wrangler | seat assembly |
|---|---|
| 2018 Jeep Wrangler | body or structural component |
| Units affected | 106 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific SUV is included.
What's the safety risk?
Reduced floor pan strength or a loose rear seat mount can let the rear seat detach in a crash, increasing the risk of injury. Until the inspection and rust protection work is complete, schedule the recall repair soon and avoid carrying rear seat passengers if the seat feels loose. Repair is free at any franchised Jeep dealer.
What should I do?
- Check your VIN to confirm your 2018 Jeep Wrangler is included in this recall.
- Contact a franchised Jeep dealer to schedule the free underbody ladder-rail inspection and rust-protection repair that protects the rear floor pan and left rear seat mount.
- Bring the recall notice if Jeep mailed one. If not, reference recall number 18V231 when you call.
- Avoid carrying passengers in the left rear seat until the dealer confirms the rear floor pan and seat mount are secured.
What happens at the repair
At the dealer, a Jeep technician inspects the driver's side rear underbody ladder rail for corrosion and coats the interior and exterior of that rail with three-part rust protection when needed. The recall repair is free, including parts and labor. If you already paid to repair the same rear underbody ladder rail corrosion issue before the recall work, the reimbursement process asks customers to send the original receipt or other proof of payment to the company for expense confirmation.
| Reimbursement | Reimbursement available |
|---|
Timeline
| April 12, 2018 | NHTSA published the recall |
|---|---|
| June 1, 2018 | Dealer notification began |
| June 1, 2018 | Dealer notification ended |
| June 1, 2018 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| June 1, 2018 | Interim owner notification (was planned for this date) |
| September 11, 2018 | Owner notification mailed |
Frequently asked questions
What is recall 18V231?
Recall 18V231 covers 106 2018 Jeep Wrangler vehicles with rear underbody ladder rail corrosion that can reduce rear floor pan strength and loosen the left rear seat mount. Jeep dealers inspect the rail and apply three-part rust protection where needed at no cost.
What should I do if my 2018 Jeep Wrangler is on this recall?
Check your VIN to confirm your specific Wrangler is included in recall 18V231. If it is, contact a franchised Jeep dealer to schedule the inspection and rust-protection repair. Reference recall 18V231 or Chrysler recall U27 when you call.
Does the recall repair cost anything?
No. Federal recall law requires manufacturers to repair safety defects at no cost. A franchised Jeep dealer will inspect the driver's side rear underbody ladder rail and add three-part rust protection where needed, free of charge.
What is the safety risk?
The safety risk is rear-seat detachment in a crash. If corrosion reduces the rear floor pan strength or loosens the left rear seat mount, the rear seat can detach during a crash and increase injury risk. The dealer repair is free.
What if I bought my Jeep Wrangler used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your specific 2018 Jeep Wrangler is included, then call a franchised Jeep dealer and reference recall 18V231 or Chrysler recall U27.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/18V231000 |
|---|---|
| Jeep customer service | 1-800-853-1403 |
| NHTSA recall # | 18V231 |
| NHTSA recall # (full) | 18V231000 |
Source documents
-
Download Misc. Document (PDF) - Download Recall Document (PDF) (PDF)
- Download Recall Document (PDF) (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 25, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →