2004 BMW 645Ci Service and Repair Manual

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Factory-Grade Data

2004 BMW 645Ci 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

  • Base Convertible 2-Door
  • Base Coupe 2-Door

Engines covered

  • 4.4L 4398CC V8 GAS 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

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Vehicle Safety Data

2004 BMW 645Ci Recalls & Complaints

No active recalls The 2004 BMW 645Ci has no recalls on file with NHTSA.
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 #10194296

Diagnosis of Compound Brake System Complaints in M Vehicles: 1. Visible cracks are caused by high thermal stresses during rapid heating and cooling of the brake discs. Braking from high speed with cold brake components (less than 212 degree

TSB #10182619

Discharged Battery Energy Diagnosis Must Be Performed: 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 doc

TSB #10037025

BMW: PROCEDURE FOR DETERMINING AND REPLACING INCANDESCENT AND HALOGEN LIGHT BULBS UNDER WARRANTY. *RM

TSB #10033130

BMW VEHICLES: FUEL LEVEL SENSOR REPAIRS. WHERE IT IS NECESSARY TO REPLACE THE RIGHT OR THE LEFT SIDE FUEL LEVEL SENSOR DUE TO A FAILURE, THE ENTIRE PUMP AND HOUSING OR DELIVERY UNIT (SUCTION JET ASSEMBLY) DO NOT NEED TO BE REPLACED AS WELL.

TSB #10022023

CRANKCASE VENTILATION SYSTEM - COLD CLIMATE CONDITIONS. *KB UPDATED ON 10/17/07. *NJ UPDATED 6/15/09. *PE

20240326Component: WHEELS

My Bmw got impounded illegally from my location where I rent commercial space and there is no signs saying car wheel be parked there at 12 at night this was an illegal tow by tow guys 3823 losse rd 70

20210906Component: ELECTRICAL SYSTEM

The idrive system in my car continues to cut on and off, this eventually caused my car to shut off on me two times while in traffic with no warning or indication of the shut off. The sensor alert cont

20210906Component: SEAT BELTS

The idrive system in my car continues to cut on and off, this eventually caused my car to shut off on me two times while in traffic with no warning or indication of the shut off. The sensor alert cont

Showing the 3 most serious of 24 complaints filed with NHTSA.

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