2018 BMW M550i xDrive Service and Repair Manual

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Fits the 2018 M550i xDrive — Base Sedan 4-Door ·
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2018 BMW M550i xDrive 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

  • Base Sedan 4-Door

Engines covered

  • 4.4L 4395CC V8 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
NHTSA #19V68400027/09/2019Component: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020

Consequence

The lack of an image in the back-up camera display increases the risk of a crash.

Remedy

BMW will notify owners, and dealers will update the back-up camera software, free of charge. The re

TSB #11017101

The Supplemental Restraint Systems (SRS) Front Passengers Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,

TSB #10252031

One or more of the LED daytime running lights are dim or discolored.

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 #10249437

The basic conditions for initializing the power windows are not met.

TSB #10244237

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

TSB #10242698

?The sunroof will not operate in either direction.

TSB #10242691

?Unusual noises occur only when operating the steering column in the axial direction.

TSB #10242694

?The front seat will not calibrate/initialize, and the stored faults cannot be deleted.

Showing the 8 most recent of 238 technical service bulletins on file with NHTSA.

20250209Component: SEATSCrash reported1 injured

Constantly pops up a message for passenger restraint system malfunction. I had an accident where I swerved off the road into a ditch at about 60 mph. I the driver was not hurt and the passenger wouldn

20250209Component: SEAT BELTSCrash reported1 injured

Constantly pops up a message for passenger restraint system malfunction. I had an accident where I swerved off the road into a ditch at about 60 mph. I the driver was not hurt and the passenger wouldn

20220414Component: POWER TRAINCrash reported1 injured

The vehicle was at a complete stop, when the gas pedal was tapped to move forward slightly the vehicle suddenly accelerated out of control. There was an attempt to apply the brakes, but the vehicle c

Showing the 3 most serious of 57 complaints filed with NHTSA.

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