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Service bulletin PS560

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)
TypeService bulletin
NHTSA id10145152
Published by NHTSA2018-10-09
Manufacturer's numberPS560
Manufacturer's date2018-09-21
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

PITSTOP - INTEGRATED BRAKE ACTUATOR UNIT (IBAU) HONK NOISE - This Pitstop provides information regarding the 2017-2018MY Niro (DE P/HEV) and Optima Plug-in/Hybrid (P/HEV) vehicles, which may exhibit an intermittent ?squeaking? and/or ?honking? noise when applying the brakes rapidly. The ?Integrated Brake Actuator Unit? (IBAU) should NOT be replaced for this concern. An IBAU brake bleed should be performed.

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

Brakes

Vehicles listed
KIA NIRO2017, 2018
KIA OPTIMA2018
KIA OPTIMA PHEV2017 (the catalog's model; the bulletin names a series or trim of it)

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
TSB_CHA098_R32020-09-03. Service bulletin. TECHNICAL SERVICE BULLETIN: IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING - This bulletin has been revised to include additional information. New/revised sections of this bulletin are indicated by a black bar in the margin area. This bulletin provides the repair procedure for the Integrated Brake Actuation Unit (iBAU) system on some 2014-2019MY EV/Hybrid/Plug-In Hybrid vehicles listed (see table), which may exhibit a "honking" (Hissing) noise due to air remaining in the brake fluid system.
PS6752020-09-03. Service bulletin. PITSTOP - BRAKE CALIPER LEAK INSPECTION - This PITSTOP provides information related to a brake caliper fluid/oil substance found on some Kia vehicles, due to possible excess assembly oil applied during assembly.
TSB_CHA098_R22020-04-07. Service bulletin. TECHNICAL SERVICE BULLETIN: IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING - This bulletin has been revised to include additional information. This bulletin provides the repair procedure for the Integrated Brake Actuation Unit (iBAU) system on some 2014-2019MY EV/Hybrid/Plug-In Hybrid vehicles listed (see table), which may exhibit a “Honking” (Hissing) noise due to air remaining in the brake fluid system.
TSBCHA1002019-11-07. Service bulletin. TECHNICAL SERVICE BULLETIN (TSBCHA100): SERVICE ACTION: AUTONOMOUS EMERGENCY BRAKE (AEB) LOGIC IMPROVEMENT (SA400) - This bulletin provides the procedure to improve the logic of the Autonomous Emergency Brake (AEB) control unit on some 2016-2017MY Optima (JFa), and 2017MY Sorento (UMa), Forte (YDm), and Sedona (YP) vehicles, which may experience unexpected AEB activation in certain circumstances.
TSBCHA098_R12019-09-06. Service bulletin. TSBCHA098_R1: IBAU SYSTEM REPAIR FOR NOISE AND AIR BLEEDING - This bulletin has been revised to include additional information. This bulletin provides the repair procedure for the Integrated Brake Actuation Unit (iBAU) system on some 2014-2019MY EV/Hybrid/Plug-In Hybrid vehicles listed (see table), which may exhibit a "Honking" (Hissing) noise due to air remaining in the brake fluid system.
TSBCHA086_R22018-08-06. Service bulletin. TSB - SERVICE ACTION: BRAKE PEDAL FEEL LOGIC IMPROVEMENT (SA325/325A) - This bulletin has been revised to include additional information. This bulletin provides the procedure to improve the logic of the Electronic Stability Control/Active Hydraulic Booster (ESC/AHB) on all 2017-2018MY Niro (DE HEV) vehicles, produced from November 1, 2016 through October 25, 2017, which is to improve brake pedal feedback and feel to the driver.
TSBCHA086R12018-06-25. Service bulletin. TSB - SERVICE ACTION: BRAKE PEDAL FEEL LOGIC IMPROVEMENT (SA325/325A) - This bulletin has been revised to include additional information. This bulletin provides the procedure to improve the logic of the Electronic Stability Control/Active Hydraulic Booster (ESC/AHB) on all 2017-2018MY Niro (DE HEV) vehicles, produced from November 1, 2016 through October 25, 2017, which is to improve brake pedal feedback and feel to the driver.
PS501_R12018-05-14. Service bulletin. PITSTOP - INTEGRATED BRAKE ACTUATION UNIT (IBAU) VARIANT CODING - On 2017-2018MY Niro (DE P/HEV) vehicles, variant coding must be performed for the Integrated Brake Actuation Unit (IBAU) after replacement of the IBAU. Follow the procedure outlined in this publication to perform the variant coding.
TSBCHA0862018-01-16. Service bulletin. TSB - SERVICE ACTION: CUSTOMER STATISFACTION BRAKE PEDAL FEEL LOGIC IMPROVEMENT (SA325) - This bulletin provides the procedure to improve the logic of the Electronic Stability Control/Active Hydraulic Booster (ESC/AHB) on some 2018MY Niro HEV (DE) vehicles, produced from July 24, 2017 through October 25, 2017, which is to address an improved brake pedal feedback and feel to the driver. This improvement does not affect the braking performance or stopping distance.
PS4572017-02-08. Service bulletin. PITSTOP: VARIANT CODING INTEGRATED BRAKE ACTUATION UNITS (IBAU) - WHEN REPLACING THE INTEGRATED BRAKE ACTUATION UNIT, IT IS NECESSARY TO PERFORM VARIANT CODING OF THE NEW MODULE. FOR ADDITIONAL INFORMATION RELATED TO VARIANT CODING CLICK THE VARIANT CODES LINK ON THE KGIS HOME PAGE. (SEE PAGE 2 FOR SAMPLE SCREEN SHOT.)