Description
Factory BMW 3 Series E21 Workshop Manual (1977–1985)
This is the factory-level service manual covering every E21 generation BMW 3 Series sold in North American and global markets from 1977 through 1985, giving home mechanics and professional technicians identical repair data used by BMW-authorized shops.
Powertrain & Drive Coverage
| Component | Variants Covered |
|---|---|
| Petrol | 1.6L M10B16, 1.8L M10B18, 2.0L M10B20, 2.0L M20B20, 2.3L M20B23 |
| Diesel | N/A |
| Transmissions | 4-speed manual, 5-speed manual, 3-speed ZF automatic |
| Drive | RWD |
| Model Years | 1977–1985 |
| Badge Twins | N/A |
Common E21 Repairs Covered
| System | Procedures |
|---|---|
| Cooling System | M20 engine coolant temperature sensor replacement, thermostat housing seal, radiator flush and refill specifications |
| Fuel Delivery | Bosch K-Jetronic fuel distributor service, carburetor rebuild (M10 variants), fuel pump replacement |
| Rear Suspension | Semi-trailing arm bushing replacement — a known wear point on high-mileage E21s — including alignment torque specs |
| Electrical | Charging system diagnosis, fuse/relay layout, full wiring diagrams for ignition, lighting, and instrumentation circuits |
Format & Delivery
PDF. Instant download; lifetime re-downloads.
Frequently Asked Questions
Which E21 body styles and trim levels are included?
The manual covers all E21 3 Series variants produced from 1977 to 1985, including the 315, 316, 318, 318i, 320, 320i, 320/6, 323i, and their respective automatic-suffix models (e.g., 323iA). Both two-door sedan and baur targa body configurations are addressed within the chassis and body sections.
Does the manual cover both the M10 four-cylinder and M20 six-cylinder engines?
Yes. Full rebuild and service procedures are included for all M10 four-cylinder variants (M10B16, M10B18, M10B20) as well as the inline-six M20B20 and M20B23 engines, covering carburetor-fed and Bosch K-Jetronic fuel-injected configurations.
Are wiring diagrams included for the US-market 318i?
Complete electrical documentation is provided for all E21 markets, including North American 318i models. You’ll find color-coded wiring schematics for the charging, ignition, fuel injection, lighting, and accessory circuits, along with fuse box layouts and ground point locations.
What format is the manual?
The manual is delivered as a fully searchable PDF file. It opens on any Windows, Mac, iOS, or Android device using a standard PDF reader — no proprietary software required. You can print individual pages for bench use and re-download the file at any time after purchase.
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