Kia Optima: Rear Corner Radar System / Rear Corner Radar Unit

Kia Optima DL3 2019-2024 Service and Repair Manual / Advanced Driver Assistance System (ADAS) / Rear Corner Radar System / Rear Corner Radar Unit


Rated voltage
12 V
Operating voltage
9 - 16 V
Max. distance
70 m
2 units (Master 1 unit, Slave 1 unit)

Schematic diagrams
Connector and Terminal Function

Repair procedures

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS).

The diagnostic system (KDS) provides the following information.


Self diagnosis : Checking failure and code number (DTC).


Current data : Checking the system input/output data state.


Actuation test : Checking the system operation condition.


Additional function : Controlling other features including system option setting and zero point adjustment.


lf replacement of the rear corner radar unit bracket or extension wire is required, replace the defective part only with a new one.


Disconnect the negative (-) battery terminal.


Remove the rear bumper assembly.

(Refer to Body - "Rear Bumper Assembly")


Disconnect the connector (A) from the rear corner radar unit.


Remove the rear corner radar unit (A) by loosening the screws.


Be careful not to damage the bracket when removing the rear corner radar unit.


In the following cases, replace the bracket.

If the bracket is physically deformed or damaged.


Remove the bracket (A) from the rear corner radar unit by loosening the screws and fasteners.


Install in the reverse order of removal.


The shapes of the LH and RH rear corner radar units are different. Therefore, take notice when installing the rear corner radar units.

After the replacing of rear corner radar unit or bracket or wire, perform the radar calibration procedures before installing the rear bumper assembly. (Failure to calibrate the radar angle,will cause the malfunction of rear corner radar system.)

(Refer to Rear Corner Radar Unit - "Adjustment")

When replacing rear corner radar unit or rear bumper with a new one, perform the variant coding procedure by using the KDS.


To correctly sense vehicles on the neighboring lanes using the radar, the direction of the sensor and the direction of the vehicle must be aligned.

This is the rear corner radar unit alignment. If this alignment is not performed as in illustration below, it may cause degradation of detection performance and false alarms.

In particular, vehicles with damaged rear bumper from accident and vehicles that replaced rear corner radar unit must carry out this alignment procedure.


Perform the radar calibration procedure using the KDS.


Select "BCW(BSD) Radar Calibration" procedure in 'Rear Corner Radar' system.


Perform the "BSD Radar Calibration" procedure as indicated on KDS screen.

Rear Corner Radar System
Components and components location Components 1. Cluster (User setting menu) 2. Rear corner radar 3. Rear corner radar indicator Descripti ...

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