2018 BMW 430i 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 Line Coupe 2-Door
- Sport Line Convertible 2-Door
- Base Convertible 2-Door
- Base Coupe 2-Door
Engines covered
- 2.0L 1998CC 122Cu. In. l4 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
BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assembli
If the vehicle has an incompatible vehicle-sensitive locking mechanism, the seat belt may not restra
BMW will notify owners, and dealers will inspect and, if necessary replace, the front seat belt asse
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.
EVAP SYSTEM PURGE (VENT) VALVE EXT LTD WTY (ELW) 15/150
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
The basic conditions for initializing the power windows are not met.
The paint finish on the door jamb (above the door striker) is scratched due to the inner door cavity window seal.
PRESSURE CONTROL VALVE (PCV) EXTENDED LTD WTY 15 YEARS/150,000 MILES
?The front seat will not calibrate/initialize, and the stored faults cannot be deleted.
After programming the head unit (HU-H2), activating the FSC (German word Freischaltcode) Enabling Codes repeatedly fails.
Showing the 8 most recent of 60 technical service bulletins on file with NHTSA.
Front driver seat , keep sliding when u hit on breaks on the left legs where seat controls are located the balance between right thigh and left thigh is not well measured so becomes increasingly uncom
Front driver seat , keep sliding when u hit on breaks on the left legs where seat controls are located the balance between right thigh and left thigh is not well measured so becomes increasingly uncom
Front driver seat , keep sliding when u hit on breaks on the left legs where seat controls are located the balance between right thigh and left thigh is not well measured so becomes increasingly uncom
Showing the 3 most serious of 47 complaints filed with NHTSA.
