Audi A4 2008-2009 Factory Service Manual

• Original OEM publication from Volkswagen United States, Inc. covering the 2008–2009 Audi A4.
• Documents engine, chassis, electrical, and fuel-injection specifications for the BKH-series 3.2 V6 powerplant.
• Applicable to manual and automatic 09L transmission variants.
• Contains 182 technical diagrams, featuring specialized tooling schematics and subframe removal illustrations.

Engine Service and Assembly Details

This manual provides the exact mechanical data required for servicing the 3.2L V6. Inside, technicians will find critical identification data for the BKH engine block, cylinder specifics, and the Simos fuel injection system. The documentation outlines the exact factory procedures for separating and installing the engine and transmission. It lists the necessary lifting tackle, support stands, and diagnostic equipment needed to execute a professional engine pull.

Technical Specifications and Maintenance Data

Expect precise torque tables for critical engine-to-transmission fasteners, spanning M6 through M12 hardware. Factory performance benchmarks are clearly defined, including the 12.5 compression ratio and 188 kW output at 6500 rpm. The reference guide provides deep technical data on sensor connections. You get exact pinouts for the Oxygen Sensor (O2S) and Engine Speed (RPM) Sensor G28.

It also details high-pressure fuel system reference values. Mechanics need to know how to safely handle the approximate 8 bar of residual pressure present during teardowns. Working with pressurized fuel systems and heavy engine components requires strict adherence to factory procedures to prevent injury or equipment damage. This publication supplies those necessary safety tolerances before you start any hands-on work. Additional sections cover the 65 Nm final-stage torque for M12 bolts, comprehensive valve clearances, and standard maintenance protocols.