2021 BMW M850i xDrive Gran Coupe Service and Repair Manual

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Factory-Grade Data

2021 BMW M850i xDrive Gran Coupe 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

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Vehicle Safety Data

2021 BMW M850i xDrive Gran Coupe Recalls & Complaints

NHTSA #25V64400025/09/2025Component: ELECTRICAL SYSTEM:STARTER ASSEMBLY

BMW of North America, LLC (BMW) is recalling certain 2020 340I, X6, 2020-2025 840I, 2020-2022 740LI, 2019-2020 X7, and X5 vehicles. After repeated attempts, the starter motor may overheat from an elec

Consequence

An overheated starter motor can ignite nearby combustible material in the engine compartment, increa

Remedy

Dealers will replace the engine starter, free of charge. This recall includes vehicles repaired und

NHTSA #21V09600019/02/2021Component: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA

BMW of North America, LLC (BMW) is recalling certain 2019-2021 X3 sDrive30i, X3 xDrive30i, X3 M40i, X3M, X4 xDrive30i, X4 M40i, M550i, X4M, X5 sDrive40i, X5 xDrive40i, X5 xDrive50i, X5M, X5 M50i, X7 x

Consequence

If the driver relies on only the rearview camera image, the missing or reduced rearview image view c

Remedy

BMW will notify owners, and dealers will inspect the rearview camera software and update it if neces

NHTSA #21V06200010/02/2021Component: SERVICE BRAKES, HYDRAULIC

BMW of North America, LLC (BMW) is recalling certain 2020-2021 8 Series Coupe, Grand Coupe and convertible 840i, 840i xDrive, M850i xDrive, M8 and 740 Li, 740 Li xDrive, 750 Li xDrive, M760 Li xDrive,

Consequence

A loss of ABS and a reduction in braking assistance can increase the risk of a crash.

Remedy

BMW will notify owners, and dealers will replace the integrated brake system, free of charge. Owner

TSB #11024203

The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the eng

TSB #11021119

The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the eng

TSB #11013036

The Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the eng

TSB #11012076

the Fuel Injector Condition-Specific Repair Coverage Program applies to qualifying repairs for the required replacement of one or more the fuel injectors which were determined to have failed due to a buildup of external corrosion in the eng

TSB #11002676

Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8).

TSB #11000498

Under certain driving situations, coolant leaks onto the fuel injectors on cylinder bank (5-8).

TSB #10249015

A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system(NVLD natural vacuum leak detection). For this condition, the following fault is stored in the DME: 190302 - fuel tank ventilation and sc

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

Showing the 8 most recent of 128 technical service bulletins on file with NHTSA.

No complaints filed No consumer complaints on file with NHTSA for the 2021 BMW M850i xDrive Gran Coupe.
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