2018 Kia Niro Service and Repair Manual

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Covers all 2018 Niro trims — Plug-In Hybrid LX Sport Utility 4-Door, SX Sport Utility 4-Door, L Sport Utility 4-Door +5 more ·
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2018 Kia Niro 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

  • Plug-In Hybrid LX Sport Utility 4-Door
  • SX Sport Utility 4-Door
  • L Sport Utility 4-Door
  • LX Sport Utility 4-Door
  • Plug-In Hybrid EX Sport Utility 4-Door
  • Plug-In Hybrid EX Premium Sport Utility 4-Door
  • Touring Sport Utility 4-Door
  • EX Sport Utility 4-Door
  • FE Sport Utility 4-Door

Engines covered

  • 1.6L 1580CC 96Cu. In. l4 PLUG-IN HYBRID EV-GAS (PHEV) DOHC Naturally Aspirated
  • 1.6L 1580CC 96Cu. In. l4 FULL HYBRID EV-GAS (FHEV) DOHC Naturally Aspirated

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
NHTSA #23V53400031/07/2023Component: POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS:ACTUATORS/S

Kia America, Inc. (Kia) is recalling certain 2017-2022 Niro and 2018-2022 Niro Plug-in Hybrid vehicles. Fluid may leak into the printed circuit board inside the hydraulic clutch actuator, which can r

Consequence

A fire increases the risk of injury.

Remedy

Dealers will inspect and replace the hydraulic clutch actuator as necessary and install a new fuse,

NHTSA #22V83600011/11/2022Component: HYBRID PROPULSION SYSTEM

Kia Motors America (Kia) is recalling certain 2017-2018 Kia Niro hybrid electric vehicles previously recalled under recall 18V-666. The Main Relay within the Power Relay Assembly (PRA) may have inade

Consequence

Overheated rear seats increase the risk of a fire.

Remedy

Dealers will inspect the PRA and replace either the PRA or the Main Relay, as necessary, free of cha

TSB #11015973

TECHNICAL SERVICE BULLETIN: SERVICE ACTION: KIA CONNECT MODEM RESET (SA611) - This bulletin outlines the procedure for resetting the modem in certain 2016-2025MY Kia vehicles listed on page 3 that are equipped with Kia Connect Services. The

TSB #10179232

TECHNICAL SERVICE BULLETIN SERVICE ACTION: IN-CABLE CONTROL BOX PROTECTION COVER INSTALLATION (SA425) - This bulletin provides information on the installation of the In-Cable Control Box (ICCB) / Level 1 Charge Cord protection cover on some

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 #11017172

TECHNICAL SERVICE BULLETIN: TRANSMISSION FLUID APPLICATION GUIDE - 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 provid

TSB #11017109

TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - 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. Th

TSB #11014912

TECHNICAL SERVICE BULLETIN: EXCESSIVE OIL CONSUMPTION NU/GAMMA/THETA/KAPPA ENGINES - 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. Th

TSB #11000787

This bulletin provides information relating to the correct transmission fluid type and fill quantity requirement for each Kia model. A flush is required ONLY when a transmission is replaced.

TSB #10238225

TECHNICAL SERVICE BULLETIN: PARTIAL REPAIR - ELECTRICAL A/C COMPRESSOR - 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

Showing the 8 most recent of 46 technical service bulletins on file with NHTSA.

20180404Component: SERVICE BRAKESCrash reported2 injured

I AM WRITING TO YOUR COMPANY IN REGARDS TO A SERIOUS ACCIDENT WHICH HAPPENED ON THE DATE OF SATURDAY, MARCH 24TH AROUND 4PM EST. THIS ACCIDENT INVOLVED MY FAMILY AND I DRIVING THE NEW KIA NIRO HYBRID

20180603Component: SERVICE BRAKESCrash reported1 injured

PURCHASED THE VEHICLE WITH SAFETY TECH PACKAGE WHICH INCLUDES AEB (AUTO EMERGENCY BRAKING) AND VEHICLE DID NOT STOP EVEN WHEN I APPLIED FULL BRAKES TO PREVENT A COLLISION. THE MAIN REASON I PURCHASED

20180603Component: UNKNOWN OR OTHERCrash reported1 injured

PURCHASED THE VEHICLE WITH SAFETY TECH PACKAGE WHICH INCLUDES AEB (AUTO EMERGENCY BRAKING) AND VEHICLE DID NOT STOP EVEN WHEN I APPLIED FULL BRAKES TO PREVENT A COLLISION. THE MAIN REASON I PURCHASED

20250429Component: SERVICE BRAKESCrash reported

I'm 59 years old never have an accident or had to slam breaks on the guy in front of me slammed his breaks on so I did the same time the brake pedal was to the floor the car didn't even slowed down

20220215Component: SERVICE BRAKESCrash reported

On 2/15/2022 around 10:00AM, I was driving my vehicle as normal. Noticed brake lights ahead, I was about 3 car lengths back, which I always try to drive since I am on the road a lot and I prefer not t

Showing the 5 most serious of 78 complaints filed with NHTSA.

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