2018 BMW M240i Service and Repair Manual

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Factory-Grade Data

2018 BMW M240i 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.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Wiring diagrams and electrical sections
  • Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

  • Sport Convertible 2-Door
  • Base Convertible 2-Door
  • M Performance Edition Coupe 2-Door
  • Base Coupe 2-Door

Engines covered

  • 3.0L 2998CC l6 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

2018 BMW M240i Recalls & Complaints

NHTSA #17V71900015/11/2017Component: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

BMW of North America, LLC (BMW) is recalling certain 2018 230i, 230i xDrive, M240i, M240i xDrive, M2, and X3 xDrive 30i SAV vehicles. These vehicles may have an error in the software for the instrume

Consequence

If the display does not illuminate during start up or does not illuminate various control and warnin

Remedy

BMW will notify owners, and dealers will update the instrument cluster display software, free of cha

NHTSA #18V46500012/07/2018Component: ENGINE AND ENGINE COOLING:ENGINE

BMW of North America, LLC (BMW) is recalling certain 2018 BMW 540d xDrive vehicles. The crankshaft sensor may be equipped with incorrect firmware, preventing the sensor from properly processing input

Consequence

A vehicle stall can increase the risk of a crash.

Remedy

BMW will notify owners, and dealers will replace the crankshaft sensor, free of charge. The recall

TSB #11032730

The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.

TSB #10249027

The electrical system of BMW vehicles has been subject to an ongoing development process over the last few years. This has led to increased demands being placed on the battery. This document covers important information for the dealer on ho

TSB #10249018

At low outside temperatures (below 40 degrees F) and slow driving speeds (i.e. when parking, maneuvering)with a large steering angle, the front end can be slightly axially misaligned. This can be felt (jerking)/ heard via an acoustic acknow

TSB #10245365

PRESSURE CONTROL VALVE (PCV) EXTENDED LTD WTY 15 YEARS/150,000 MILES

TSB #10244237

Functional noises (squealing/honking) when braking shortly before the vehicle comes to a stop. CAUSE Material-

TSB #10238090

After programming the head unit (HU-H2), activating the FSC (German word Freischaltcode) Enabling Codes repeatedly fails.

TSB #10235205

The 3G network in the US has been shut down. This means that only the 4G network will be available. In the 4G network, voice calls will be transferred via the Voice over LTE (VoLTE) function. For this purpose, the SIM card must perform an I

TSB #10230722

After an automatic engine start (MSA start), the transmission intermittently goes into the Park "P" or Neutral "N" position without any customer influence.

Showing the 8 most recent of 53 technical service bulletins on file with NHTSA.

20240125Component: ELECTRICAL SYSTEM

2018 BMW M240i - no sound from radio, or any aux input. May be blown amplifier. Extremely loud crackling sound, intermitent sound.

20231129Component: EXTERIOR LIGHTING

Each of the two LED taillights have failed. The right rear LED turn signal failed in the Spring of 2022 when the car had approximately 12,000 miles of use and the left rear LED turn signal failed in

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