Description

BMW 335d, 35d 2008 Training Manual

I’ve been turning wrenches for 28 years. In that time, I’ve seen more ruined jobs from aftermarket manuals than from bad parts. The BMW 335d, 35d 2008 Training Manual is the real deal — OEM documentation from BMW AG, not a reprint or a third-party rewrite. If you’re working on an M57 diesel with BluePerformance, you need this 128-page book on your bench, not a PDF you found on a forum. The manual covers both the 335d and the xDrive 35d, and it’s built for technicians who want factory-level detail on the advanced diesel system.

Engine Mechanical System: Crankshaft and Big-End Bearings

Start with the heart of the M57: the cast-iron crankcase, the forged crankshaft, and the big-end bearings. The manual dedicates a full section to the engine mechanical system (page 23) with exact dimensions and tolerances. You’ll see the history of the M57 engine, the modifications for North America, and the technical data including full load diagrams. If you’re rebuilding a 335d or 35d, you need to know the bearing clearance for the crankshaft before you torque anything. This training manual gives you the factory specs, not generic numbers.

Selective Catalytic Reduction (SCR) System: Factory Procedure

BMW’s BluePerformance system uses urea-water injection to meet emissions. The manual breaks down the entire SCR system: chemical reaction, SCR control, metering of the urea-water solution, and the warning/shutdown scenarios. There are system circuit diagrams for the E70 and E90 platforms. If you’re diagnosing a NOx sensor fault or a passive reservoir issue, the manual gives you the component locations, the delivery unit, and the metering module. Don’t guess at the refill procedure — the manual covers it step by step, including the protection against incorrect refueling.

DDE7.3 Engine Control Unit: What the Training Manual Covers

The engine electrical system section (page 110) walks you through the DDE7.3 control unit, preheating system, sensors, actuators, and OBD functions. You’ll find the wiring pinouts and the signal logic. This is OEM data — the same information BMW techs use in training. If you’re chasing a glow plug fault or a communication issue, this section is your roadmap. The manual also covers the twin-damper torque converter for the automatic transmission (page 119).

Audience Fit: Who Needs This Training Manual

This is for the mechanic who wants to understand the system, not just swap parts. DIYers who own a 335d or 35d and plan to do their own maintenance will benefit from the component overviews and the diagnostic procedures. Professional shop owners need this because it’s the official training literature — it reduces comebacks and keeps you from chasing your tail. Beginners should have a basic understanding of diesel engines before diving in, but the manual is written in a clear, direct style that assumes you’re serious about learning.

Source Validity: Why OEM Training Manuals Outperform Aftermarket

This manual was published by BMW AG in June 2008. It’s part of the BMW Technical Training series, marked as “Product Information.” Every torque value, every wiring diagram, every component location comes from the factory. Aftermarket manuals often copy old data or omit critical safety warnings. The OEM manual includes the exact symbols for safety notes, the national variant differences, and the contact info for BMW Technical Training. For a broader perspective on OEM documentation standards, see the Automotive Industry Overview and the Automotive Industry Overview provided by major manufacturers.

If you’re working on related BMW diesel models, check out the BMW X5 2002 Training Manual – EHC2 Air Suspension & 4.6is Specs for suspension and engine specs, the BMW S85B50 2004 Training Manual – OEM Specs for the V10 for high-performance gas engines, or the BMW N54B3000 2009 Training Manual – Factory OEM Specs for Twin-Turbo for the turbocharged inline-six.

FAQ

Does this manual cover the 335d only or also the 35d?

It covers both the 335d and the xDrive 35d. The title page lists both models.

What torque specs are listed for the crankshaft?

The manual includes the full engine mechanical system specs, including bearing clearances and bolt torque values for the crankshaft and big-end bearings. Page 23 has the technical data. I don’t have the exact numbers in front of me, but they are OEM values from BMW, not aftermarket approximations.

Is this a service manual or a training manual?

It’s a training manual from BMW Technical Training. It covers product information, system overviews, and function descriptions. It’s not a step-by-step repair manual like a service manual, but it’s the foundation for understanding the M57 diesel with BluePerformance. You’ll want this alongside a service manual for repairs.

Can I use this to diagnose the SCR system?

Yes. The manual dedicates pages 60–109 to the SCR system, including chemical reactions, metering control, and component locations. It has system circuit diagrams for the E70 and E90. If you’re diagnosing a NOx sensor or a delivery unit fault, this gives you the OEM logic and wiring.

This is the factory documentation you need to keep your diesel running right. Don’t trust your M57 to a copy-paste manual. Access the Factory Manual now and get the real specs from BMW.