2021 Kia K5 Service and Repair Manual

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Factory-Grade Data

2021 Kia K5 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • LXS Sedan 4-Door
  • EX Sedan 4-Door
  • GT Sedan 4-Door
  • LX Sedan 4-Door
  • GT-Line Sedan 4-Door

Engines covered

  • 1.6L 1598CC 98Cu. In. l4 GAS DOHC Turbocharged
  • 2.5L 2497CC l4 GAS DOHC Turbocharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2021 Kia K5 Recalls & Complaints

NHTSA #25V79400017/11/2025Component: FUEL SYSTEM, GASOLINE

Kia America, Inc. (Kia) is recalling certain 2021-2024 K5 vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tan

Consequence

A melted fuel tank can leak, increasing the risk of a fire.

Remedy

Dealers will replace the check valve. The fuel tank will be inspected for damage and replaced as nec

NHTSA #22V76000011/10/2022Component: POWER TRAIN:AUTOMATIC TRANSMISSION

Kia Motors, Inc. (Kia) is recalling certain 2021-2022 Sorento and 2021-2023 K5 vehicles. The vehicle's "fail-safe" limited-mobility drive mode may be impaired, when prompted by a transmission oil pum

Consequence

Loss of drive power increases the risk of a crash.

Remedy

Dealers will inspect and replace the transmission, as necessary. Dealers will also update the trans

NHTSA #21V16400011/03/2021Component: AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE

Kia Motors America (Kia) is recalling certain 2021 Telluride, K5, and Forte vehicles. The Occupant Classification and Detection System (OCS/ODS) unit may not detect the presence of a child restraint s

Consequence

In the event of a crash, deployment of the front passenger air bag, with a child in that seat, can i

Remedy

Kia will notify owners, and dealers will replace the OCS/ODS unit, free of charge. The recall began

NHTSA #21V51900008/07/2021Component: FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

Kia Motor America (Kia) is recalling certain 2021 Sorento and 2021-2022 K5 vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between the high-pressure fuel pump a

Consequence

A fuel leak increases the risk of a fire.

Remedy

Dealers will inspect and tighten, or replace the fuel pipe as necessary, free of charge. Owner noti

NHTSA #23V14900007/03/2023Component: AIR BAGS:SIDE/WINDOW:CURTAIN

Kia America, Inc. (Kia) is recalling certain 2021-2023 K5 vehicles. The side curtain air bags may have been installed incorrectly, causing them not to deploy properly in the event of a crash.

Consequence

Air bags that do not deploy as intended can increase the risk of injury in a crash.

Remedy

Dealers will inspect and reinstall the side curtain air bags, as necessary, free of charge. Owner n

TSB #11031906

TECHNICAL SERVICE BULLETIN: INFOTAINMENT SOFTWARE UPDATE PROCEDURE - This bulletin provides information on the process for downloading infotainment software updates and preparing USB for installation on applicable Kia vehicles. The software

TSB #11028908

TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin has been revised to include additional information. New/revised sections of this bulletin are ind

TSB #11027856

TECHNICAL SERVICE BULLETIN: VOLUNTARY EMISSIONS SERVICE CAMPAIGN: FUEL TANK AND/OR PCSV CHECK VALVE INSPECTION/REPLACEMENT + ECU SW UPGRADE (SC288/SC288A) CLOSED & SUPERSEDED - This bulletin is now closed and superseded by SC356. This bulle

TSB #11026980

CUSTOMER SATISFACTION CAMPAIGN: OWNER NOTIFICATION (CS2312) - This document is the owner notification advising that Kia is conducting Customer Satisfaction Campaign. A software upgrade that addresses the social media theft method has been m

TSB #11026825

TECHNICAL SERVICE BULLETIN: CUSTOMER SATISFACTION: THEFT DETERRENT IGNITION CYLINDER PROTECTOR AND DECAL INSTALLATION (CS2312) - This bulletin provides information to install a Theft Deterrent Ignition Cylinder Protector on certain 2010-202

TSB #11026698

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

TSB #11025760

TECHNICAL SERVICE BULLETIN: ITM REPLACEMENT AND ECM LOGIC IMPROVEMENT (CA2511) - This bulletin provides information to replace the Integrated Thermal Management Module (ITM) and then upgrade the Engine Control Module ECM system software on

TSB #11024347

VOLUNTARY EMISSIONS SERVICE CAMPAIGN: OWNER RENOTIFICATION (SC288 FLIGHT 301) - This document is the owner renotification advising that Kia is conducting a Voluntary Emissions Service Campaign on certain 2021-2024 MY K5 vehicles equipped wi

Showing the 8 most recent of 130 technical service bulletins on file with NHTSA.

20230130Component: AIR BAGSCrash reported2 injured

I was rearended into another vehicle at a speed of about 50mph, then rearended again by and SUV, not one of my 9 airbags deployed.

20231128Component: AIR BAGSCrash reported1 injured1 fatalities

While on her way from work, my mother was involved in an accident in her 2021 Kia K5 LXS where she was rear ended at a high speed by a driver not paying attention to the road and she ended up hitting

20210305Component: AIR BAGSCrash reported1 injured

I WAS TRAVELING 45 MPH IN MY 2021 K5 GT LINE WHEN AN OLDER TOYOTA CAMRY CROSSED MY PATH. I APPLIED BRAKES BUT THERE WAS NO AVOIDING THE COLLISION. I BROADSIDED THE CAMRY AT SOMEWHERE BETWEEN 30 AND 35

20210305Component: SEATSCrash reported1 injured

I WAS TRAVELING 45 MPH IN MY 2021 K5 GT LINE WHEN AN OLDER TOYOTA CAMRY CROSSED MY PATH. I APPLIED BRAKES BUT THERE WAS NO AVOIDING THE COLLISION. I BROADSIDED THE CAMRY AT SOMEWHERE BETWEEN 30 AND 35

20210202Component: UNKNOWN OR OTHERCrash reported1 injured

I WAS TRAVELING AT APPROXIMATELY 40-45 MPH, ANOTHER VEHICLE CROSSED IN MY PATH, AND I BROADSIDED HIS VEHICLE. I AM NOT SURE OF MY SPEED AT IMPACT. I WOULD GUESS 30 MPH. AIRBAGS DID NOT DEPLOY. THE REA

Showing the 5 most serious of 227 complaints filed with NHTSA.

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