Description

BMW 318, 325 Service Manual

BMW 318, 325 Service Manual – you see those numbers on the cover and think you can get away with a generic PDF. I’ve torqued enough head bolts to know that aftermarket “reprints” leave out the critical details that keep a car together. This 119-page OEM manual covers the body and interior systems for the 318 and 325 models. Page 43 has the exact charge pressure and oil type for the A/C. Page 28 shows the central locking drive identification table – the one you need when a door actuator fails and you’re staring at a bin of mixed parts. No fluff, no generic diagrams. Factory-trained writers drew these.

Body and Interior Coverage: What This Manual Covers

Look at the Table of Contents – it’s a BMW-specific breakdown. Section 9 Air Conditioning runs from page 42 through 43, including system description, safety features (page 42), inspections and tests, and a full specification table. The central locking system gets a dedicated table (Table a) on page 28. If you’re rebuilding seats or replacing door panels, the structural integrity notes are in here. You won’t find engine or transmission data – this is a targeted body-and-interior resource for the E30 generation 318i and 325i.

Air Conditioning Specifications: Page 43

Checking refrigerant charge? The manual tells you the correct high-side and low-side pressures at specific ambient temperatures. No guesswork. It also lists the approved compressor oil – use the wrong viscosity and you’ll grenade the A/C system in a season. Safety warnings are stamped right into the procedure: wear goggles, never open high-side when hot. That’s OEM documentation, not a third-party rewrite.

Central Locking System: Table a on Page 28

When a locking drive fails, you need the exact part number and orientation. Table a lists every drive variant for the 318 and 325. I’ve seen techs order three different actuators because they trusted a Chilton diagram. This table saves that headache. The manual also covers wiring continuity checks for the central locking control unit – step-by-step, no shortcuts.

OEM vs Aftermarket Manuals

Compare this to any aftermarket guide. The factory manual includes the original BMW part numbers, torque values (where applicable to interior fasteners), and diagnostic flows that match the dealer scan tool. Aftermarket guides often blur photos or omit the “if this then that” logic. For a DIYer working on a 30-year-old BMW, one wrong assumption can crack a brittle plastic trim piece or short a module. This manual assumes you have basic tools but not psychic abilities. Automotive Industry Overview – that link shows the broader context of why OEM documentation matters across all makes.

Is This Manual for You?

If you own a BMW 318 or 325 from the late-80s to early-90s and you plan to replace seat upholstery, fix A/C, or sort out a central locking gremlin, this is the right book. Home garage enthusiasts who already have a multimeter and a set of Torx bits will get the most out of it. Beginners might need a buddy to explain some abbreviations, but the steps are laid out in plain English – no “step-by-step guide” nonsense, just real directions. BMW 3 Series 1998 Electrical Troubleshooting Manual complements this if you need wiring diagrams for later models. For the E36 era, see BMW E36 1999 Electrical Troubleshooting Manual or BMW 3 Series E36 1996 Electrical Troubleshooting Manual.

Frequently Asked Questions

Does this manual cover the engine or drivetrain?

No. It is exclusively body and interior. For engine specs you need the separate powertrain manual.

What is the publication year?

Not listed on the PDF cover. The content is based on factory data for the E30 generation 318/325, likely late 1980s. Procedures remain valid for those model years.

Can I use this manual for a 318ti or 325ix?

The 318ti (compact) and 325ix (all‑wheel drive) share many interior components but not all. Use the central locking table on page 28 to confirm part numbers before ordering. The A/C section applies to all R12‑based systems used in that generation. Replace the refrigerant type if retrofitting to R134a – the manual does not cover that conversion.

Does it include wiring diagrams?

Limited to body electricals such as central locking and A/C controls. For full chassis wiring, you need the electrical troubleshooting manual. Automotive Industry Overview discusses how BMW structured its documentation.

Access the Factory Manual. Stop chasing bad information. Get the OEM data that matches what the dealer used when these cars were new. 119 pages of verified BMW body and interior specifications – put it on your tablet and keep your projects moving.