KIA Niro: Rear Brake

Rear Brake Disc Thickness Check

  1. Check the brake pads for wear and fade.
  2. Check the brake disc for damage and cracks.
  3. Remove all rust and contamination from the surface, and measure the disc thickness at 8 points, at least, of same distance (5mm) from the brake disc outer circle.

Brake disc thickness

Standard: 10 mm (0.39 in)

Service limit: 8.4 mm (0.33 in)

Deviation: less than 0.01 mm (0.0004 in)

  1. If wear exceeds the limit, replace the discs and pad assembly left and right of the vehicle.

Rear Brake Pad Check

  1. Check the pad wear. Measure the pad thickness and replace it, if it is less than the specified value.

Pad thickness

Standard value: 10.0 mm (0.3937 in.)

Service limit: 2.0 mm (0.0787 in.)

  1. Check that grease is applied, to sliding contact points. Check for metal damage to the pad and backing.

Rear Brake Disc Runout Check

Rear Brake Disc Runout Check

  1. Place a dial gauge about 5mm (0.2 in.) from the outer circumference of the brake disc, and measure the runout of the disc.

Brake disc runout Limit: 0.05 mm (0.002 in.) or less (new one)

  1. If the runout of the brake disc exceeds the limit specification, replace the disc, and then measure the runout again.
  2. If the runout does not meet the limit specification, remove the disc, turn it 180º and reinstall. Then check the runout of the brake disc again.
  3. If the runout cannot be corrected by changing the position of the brake disc, replace the brake disc.


  1. Check the drive shaft boots for loose clamps, cracks, grease leaks, kinks or damage.



Check whether the stroke is within specification when the parking brake pedal is depressed with 66 lb, 294 N(30 kg) of force. Also, the parking brake alone should securely hold the vehicle on a fairly steep grade. If the stroke is more or less than specified, have the parking brake adjusted by an authorized Kia dealer.

Stroke : 6 - 7 notch


  1. Check the steering wheel free road.

(1) Turn the steering wheel so that the front wheels can face straight ahead.

(2) Measure the distance the steering wheel can be turned without moving the front wheels.

Standard value: 30mm (1.18in.) or less

(3) If the play exceeds standard value, inspect the steering column, shaft, and linkages.

  1. Check the steering linkage for looseness or damage.

(1) Check that the dust parking and cap are not damaged.

(2) Check that the Bellows bands are not loose.

(3) Check that the steering gear box is not damaged.

(4) Check that the column and shaft are properly connected to the steering gear box.


Visually check, must be free from injurious flaw and crack.


Visually check the loose mount bolt.


     Tire Rotation

    Inspection Check the tire pressure. 16(inch) : 2.5kg/cm²(36psi) 18(inch) : 2.5kg/cm²(36psi) Tire Rotation Checking For Pull And Wander If the steering pulls to one side, rotate the tires according to the following wheel rotation proced

     Checking Refrigerant Specifications

    Check refrigerant specifications label inside engine room. Examples R-134a R-1234yf If refrigerant specifications label is not visible, check the refrigerant service port diameter. High pressure side R-134a R-1234yf Low p

     Refrigerant System Service Basics (R- 134a)

    For the electric compressor using high-voltage, use POE oil with high insulation property. Use a separate equipment (refrigerant recovery / charger) exclusive for hybrid vehicle maintenance to prevent infusion of PAG oil of non-hybrid v


     Connecting Rod

    Check the connecting rod side clearance. Using a feeler gauge, measure the end play while moving the connecting rod back and forth. If out-of-tolerance, install a new connecting rod. If still out-of-tolerance, replace the crankshaft.

     Hybrid Power Control Unit (HPCU) connector and high voltage cable

    Hybrid Power Control Unit (HPCU) terminal And Input/Output signal HPCU Terminal Function Connector (C133-S) (94Pin) : HPCU signal input and control High Voltage Cable (C133-P) (2 Pin) : HPCU↔Power Relay Assembly