2018 Acura RLX Service and Repair Manual

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Factory-Grade Data

The 2018 Acura RLX service and repair manual is a practical, OEM-style reference for maintenance, diagnostics, and repair work. You’ll get step-by-step procedures, specifications, torque values, diagrams, and system information to help you troubleshoot accurately and finish jobs faster.

Ideal for professional technicians and DIY owners, this manual covers core vehicle systems including engine, brakes, steering, suspension, HVAC, and wiring diagrams. Instant digital access after purchase.

Trims covered

  • Base Sedan 4-Door
  • Sport Hybrid SH-AWD Sedan 4-Door

Engines covered

  • 3.5L 3471CC V6 GAS SOHC Naturally Aspirated
  • 3.5L 3471CC V6 FULL HYBRID EV-GAS (FHEV) SOHC Naturally Aspirated

Index / Table of contents

  • Body
  • Body Repair
  • Body Repair Basic
  • Brakes
  • Control System DTCs
  • Driving Support & Restraints
  • Engine
  • HVAC
  • Network Communication
  • Paint Repair Basic
  • Steering
  • Suspension
  • Symptom
  • Trans/Driveline
  • Vehicle General Information
  • Wiring Diagrams

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Vehicle Safety Data

2018 Acura RLX Recalls & Complaints

NHTSA #23V85800018/12/2023Component: FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP

Honda (American Honda Motor Co.) is recalling certain 2013-2023 Honda Accord, Civic Coupe, Civic Sedan, Civic Hatchback, Civic Type R, CR-V, HR-V, Ridgeline, Odyssey, Acura ILX, MDX, MDX Hybrid, RDX,

Consequence

Fuel pump failure can cause an engine stall while driving, increasing the risk of a crash.

Remedy

Dealers will replace the fuel pump module, free of charge. Owner letters were mailed September 6, 2

TSB #10241470

Warranty Extension - Under certain circumstances, abnormal noise may be heard from the rear when driving straight or making small side-to-side turning movements with the steering wheel. The P-AWS indicator or warning light may also illumina

TSB #10239512

Owner Notification Letter - Under certain circumstances, abnormal noise may be heard from the rear when driving straight or making small side-to-side turning movements with the steering wheel. The MIL may also illuminate with certain DTC co

TSB #10237815

Service Bulletin - Due to manufacturing errors, abnormal noise may be heard from the rear when driving straight or making small side-toside turning movements with the steering wheel. The MIL may also illuminate with DTC C1600-94 (PAWS unex

TSB #10237809

Dealer Message - Due to manufacturing errors, abnormal noise may be heard from the rear when driving straight or making small side-to-side turning movements with the steering wheel. The MIL may also illuminate with DTC C1600-94 (PAWS unexpe

TSB #10213569

American Honda Motor Co., Inc. (AHM) is searching for certain 2016-2020 MDXs, RLXs & TLXs with a client complaint of the Malfunction Indicator Light (MIL) on with the DTC P030X (Cylinder Misfire Detected), P0171 & P0174 (Rear/Front Bank Fue

TSB #10180017

Service Bulletin - The timing belt area chirps after the engine warms up.

TSB #10178469

Service Bulletin - The timing belt area makes a chirping noise after the engine warms up.

TSB #10176782

Service Bulletin - The blower motor makes excessive noise, runs slowly, or intermittently stops working.

Showing the 8 most recent of 21 technical service bulletins on file with NHTSA.

20260518Component: ENGINE AND ENGINE COOLING:ENGINE:CRANK/CAMSHAFT POSITION SENSOR

The contact owns a 2018 Acura RLX. The contact stated while driving her vehicle at an undisclosed speed, stated that the vehicle would not start up, and noticed every single waring light illuminated

20260518Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY

The contact owns a 2018 Acura RLX. The contact stated while driving her vehicle at an undisclosed speed, stated that the vehicle would not start up, and noticed every single waring light illuminated

20260306Component: ELECTRICAL SYSTEM

The contact owns a 2018 Acura RLX. The contact stated that while attempting to start the vehicle, the headlight failure message was displayed. A dealer was contacted. The vehicle was taken to the deal

20250212Component: ENGINE AND ENGINE COOLING

The contact owns a 2018 Acura RLX. The contact stated while driving 30 MPH, the oil change and tire rotation messages were displayed. The contact stated that a dealer was contacted. The contact stated

20241203Component: FUEL SYSTEM, GASOLINE

The contact owns a 2018 Acura RLX. The contact received notification of NHTSA Campaign Number: 23V858000 (Fuel System, Gasoline); however, the part to do the recall repair was unavailable. The contact

Showing the 5 most serious of 6 complaints filed with NHTSA.

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