Service bulletin PS551

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10133175
Published by NHTSA	2018-04-16
Manufacturer's number	PS551
Manufacturer's date	2018-03-29
NHTSA component	BACK OVER PREVENTION; LATCHES/LOCKS/LINKAGES:TRUNK LID:LOCK

NHTSA's summary

PITSTOP - RATTLE NOISE FROM REAR OF THE VEHICLE (PS551) - This Pitstop contains information regarding a rattle type noise heard from the rear of the vehicle when closing a door or trunk on some 2016MY-2018MY vehicles.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Driver assistance, Latches and locks, Backup camera

Vehicles listed
KIA FORTE	2017, 2018
KIA NIRO	2017, 2018
KIA RIO	2018
KIA SORENTO	2016, 2017, 2018
KIA SPORTAGE	2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PS797	2025-12-18. Other. PITSTOP: TECHNICAL OPERATIONS: EXTERNAL DAMAGE TO ULTRASONIC SENSOR: This Pitstop provides information related to Parking Distance Warning (PDW) alerts and repairs involving ultrasonic sensors. The PDW system alerts the driver while parking, by calculating distance based on the difference in signal transmission and reception times between the vehicle (ultrasonic sensor) and an object. The membrane film of the ultrasonic sensor is used for object detention and can be damaged by stone chips or foreign substances while driving. Damage to the cover of the ultrasonic sensor can also lead to damage to the internal circuit. As a result of this external damage, the PDW system may not receive the proper signal from the ultrasonic sensor. In some cases, the system may cause a false alarm, no alert, or phantom warnings by a “Warning Lamp’ to be displayed on the cluster. The ultrasonic sensor membrane film should be always inspected for external damage and if any part replacement should be treated as a general repair, not as a warranty claim repair for this concern. (Please note that this Pitstop only applies to models/trims that are equipped with the ultrasonic sensors.)
TSB_ELE205	2020-09-03. Service bulletin. TECHNICAL SERVICE BULLETIN: REAR VIEW CAMERA REPLACEMENT - This bulletin provides the procedure to replace the rear view camera on some 2016-2020MY Sorento (UMa) produced from SOP through July 9, 2020, due to distortion and/or blue screen caused by moisture intrusion into the camera assembly.
PS546	2018-04-16. Service bulletin. PITSTOP - ELECTRONIC STABILITY CONTROL SELF-CHECK NOISE - This Pitstop provides information regarding a concern related to a single faint ?thud? type noise heard from the engine compartment at speeds of 18-20 MPH after initial start-up. Be aware that the Electronic Stability Control (ESC) system performs it?s self-check under these conditions. This single faint ?thud? type noise is normal and indicates that the ESC is functioning properly.
TSB-ELE123R1	2017-08-02. Service bulletin. TSB: DARK BACK-UP CAMERA DISPLAY ON UVO eSERVICES (UVO 2.0) - This bulletin provides the procedure to upgrade the UVO 2.0 software on some 2016MY Sorento (UMa) vehicles, produced from October 27, 2014 to April 26, 2016, which may experience a ?dark? back-up camera display in situations in which there is partial shade and bright sunlight causing high contrast. This may occur when backing out of a garage or when parked under trees and is dependent upon the sun position in the sky. Follow the procedure outlined in this bulletin to improve the brightness of the back-up camera.
TSB-ELE123	2017-08-02. Service bulletin. TSB: DARK BACK-UP CAMERA DISPLAY ON UVO eSERVICES (UVO 2.0) - This bulletin provides the procedure to upgrade the UVO 2.0 software on some 2016MY Sorento (UMa) vehicles, produced from October 27, 2014 to April 26, 2016, which may experience a ?dark? back-up camera display in situations in which there is partial shade and bright sunlight causing high contrast. This may occur when backing out of a garage or when parked under trees and is dependent upon the sun position in the sky. Follow the procedure outlined in this bulletin to improve the brightness of the back-up camera.