BMW GUIDES

Here is a collection of some of the best write ups and troubleshooting resources.

Please submit any links that you would like added to this resource map here.

A master index of E90 guides can also be found here

General Maintenance:

Coding, INPA, Rheingold, WinkFP, ISTA

Performance Upgrades:

Engine Mechanical

Engine Electrical

Fuel System

RadiatorExhaust System

Suspension related to Engine and Transmission Automatic Transmission

GearshiftAxlesSteering

BrakesPedalsWheels

Body Work and Vehicle Trim

Seats

Vehicle Electrical System

Instruments, Gauges, Measuring SystemsLighting

Heating and Air ConditioningAudio and Navigation Electronic SystemsDistance Systems and Cruise ControlRestraint systems

Common Trouble Codes

Fault Code: 004987 - Exhaust gas temperature sensor upstream of the catalyst, signal...
Solution: Replace EGT #1 or it may be plugged into the wrong socket

Fault Code: 43D1 - P2621 - Throttle-valve actuator, activation: Short circuit to
ground...
Solution: Check wiring to throttle valve or replace

BMW Guides