Safety Recall U27 / NHTSA 18V-231 Under Body Ladder Rail – 2018 Jeep Wrangler

April 12, 2018 NHTSA CAMPAIGN NUMBER: 18V231000

Left Rear Frame Section may Corrode

If the floor pan strength is reduced and/or the rear seat mount becomes loose, the rear seat may detach in a crash, increasing the risk of injury.


NHTSA Campaign Number: 18V231

Manufacturer Chrysler (FCA US LLC)


Potential Number of Units Affected 106



Chrysler (FCA US LLC) is recalling certain 2018 Jeep Wrangler vehicles. The rear under body ladder rail may corrode, possibly reducing the strength of the rear floor pan and causing the left rear seat mount to become loose.



Chrysler will notify owners, and dealers will inspect and, as necessary, coat the interior and exterior of the driver’s side rear underbody ladder rail with three-part rust protection. The recall began September 11, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler’s number for this recall is U27.



Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to


Check if your Vehicle has a Recall


Revised October 2018

Dealer Service Instructions for:

Safety Recall U27 / NHTSA 18V-231
Under Body Ladder Rail

NOTE: Section A.  Date Code Inspection revised.


Remedy Available

2018 (JK) Jeep Wrangler


NOTE:  This recall applies only to the above vehicles equipped with four doors and built from October 15, 2017 through October 16, 2017 (MDH 101500 through 101617).

IMPORTANT:  Some of the involved vehicles may be in dealer new vehicle inventory.  Federal law requires you to complete this recall service on these vehicles before retail delivery.  Dealers should also consider this requirement to apply to used vehicle inventory and should perform this recall on vehicles in for service.  Involved vehicles can be determined by using the VIP inquiry process.



The driver’s side rear under body ladder rail on about 100 of the above vehicles may have been built with reduced corrosion protection which may, in certain circumstances, eventually result in a loose left rear seat mount or reduced strength of the rear floor pan due to premature corrosion.  A loose left rear seat mount or reduced strength of the rear floor pan due to corrosion could, during a vehicle crash, allow two of the six attachment fasteners for the left rear seat to not be retained to the floor pan and/or the left rear floor pan structural frame member to buckle, which may increase the risk of injury.



Inspect the left side (driver’s side) rear longitudinal under body ladder rail date code marking.  If repair is needed, the interior and exterior of the left side rear under body ladder rail will be coated with three-part rust protection, or if deemed unrepairable, the vehicle will be repurchased.

1 Affected Product




14 Associated Documents

Defect Notice 573 Report

RCLRPT-18V231-5154.PDF 216.226KB



Recall Acknowledgement

RCAK-18V231-1431.pdf 247.425KB



Manufacturer Notices(to Dealers,etc) – 04/19/2018 New Safety Recall Advanced Communication – U27

RCMN-18V231-4074.pdf 207.526KB



Manufacturer Notices(to Dealers,etc) – U27 Owner Interim

RCMN-18V231-1176.pdf 250.269KB



ISSUED Interim Owner Notification Letter(Part 577)

RIONL-18V231-7337.pdf 250.269KB



Remedy Instructions and TSB

RCRIT-18V231-0417.pdf 1398.614KB



Recall Quarterly Report #1, 2018-3

RCLQRT-18V231-4298.PDF 211.132KB



Renotification Representative Copy

RMISC-18V231-8208.pdf 41.786KB



ISSUED Renotification Notice

RCRN-18V231-6811.pdf 136.589KB



Recall Quarterly Report #2, 2018-4

RCLQRT-18V231-6045.PDF 211.233KB



Recall 573 Report-Amendment 1

RCLRPT-18V231-9681.PDF 216.348KB



ISSUED Owner Notification Letter(Part 577)

RCONL-18V231-3639.pdf 320.243KB



Remedy Instructions and TSB

RCRIT-18V231-0505.pdf 1398.837KB



Recall Quarterly Report #3, 2019-1

RCLQRT-18V231-8203.PDF 211.314KB



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