The Ultimate Guide to the Porsche 928 Parts Manual

Owning a Porsche 928 means you have a piece of automotive history. But keeping this V8 grand tourer running smoothly requires the right documentation—especially the Porsche 928 parts manual. Unlike a service manual that explains how to repair components, a parts manual (often called an illustrated parts catalog or IPC) provides exploded diagrams and part numbers for every piece of the car. This guide explains what a parts manual covers, how it differs from other manuals, where to find a genuine or reproduction copy, and how to get the most out of it.

What Is a Porsche 928 Parts Manual?

The parts manual is the official list of every component used to assemble the Porsche 928. It includes:

• Exploded view diagrams showing how parts fit together
• Part numbers for ordering replacements
• Quantity and location of fasteners
• Supersession information (if a part was replaced by a newer design)

Porsche released these manuals for each model year and variant (US vs. rest of world, automatic vs. manual, etc.). The most comprehensive versions cover the early 928 (1978–1986) and the 928 S4/GT/GTS (1987–1995).

Parts Manual vs. Service Manual

Many owners confuse the parts manual with the factory service manual. The service manual (or workshop manual) contains step-by-step repair procedures, torque specs, and diagnostic information. The parts manual does not tell you how to fix anything—it tells you which specific bolt, gasket, or seal goes where, and what its part number is. Both are essential, but they serve different purposes.

Why You Need a Parts Manual

Restoring or maintaining a 928 without a parts manual is like assembling a puzzle without the picture. Here’s why it matters:

• Correct part numbers: Aftermarket catalogs can be outdated or inaccurate. The factory manual ensures you get the exact part Porsche specified.
• Exploded diagrams: Seeing how parts relate to each other helps prevent assembly mistakes.
• Supersession awareness: Many original parts are now replaced by improved versions. The manual notes these changes.
• New old stock (NOS) sourcing: If you’re hunting for rare parts, knowing the OEM number lets you search effectively on enthusiast forums or at swap meets.

Where to Get a Porsche 928 Parts Manual

Factory Printed Manuals

The original manuals were bound in thick paper and sold through Porsche dealers. They are now out of print, but you can find used copies:

• eBay and Porsche-specific classifieds: Expect to pay $100–$400 depending on condition and completeness.
• Swap meets and car shows: Sometimes available from 928 specialists.

Digital Reproductions

Several Porsche parts vendors offer digital versions (PDF) on CD or USB. Advantages:

• Searchable text (if OCR’d)
• Printable pages for use in the garage
• Often cheaper than a paper manual

Well-known suppliers include Pelican Parts, 928 Motorsports, and Roger’s 928 Shop. Be sure the digital copy covers your specific model year. Some vendors sell a single PDF for all years, but the accuracy of the part numbers may vary.

Online Parts Catalogs (Free)

Porsche has an official online parts database, but it’s designed for current models. For the 928, you can use sites like Parts.com or Design911 which have digitized the factory parts list. These are convenient for quick lookups but may not include every supersession.

Factory Microfiche

Early parts manuals were also released on microfiche (film cards). If you find a microfiche reader—or can convert it—this is the most authentic source. However, it’s impractical for daily use.

How to Use the Parts Manual

Understanding the Diagram Numbers

Each diagram has a figure number (e.g., “Fig. 1–01”) and a group number that corresponds to a main category. For the 928, groups include:

• 1: Engine
• 2: Transmission
• 3: Front Axle
• 4: Rear Axle
• 5: Steering
• 6: Brakes
• 7: Wheels/Tires
• 8: Body
• 9: Electrical
• 10: Heating/AC
• 11: Fuel System
• 12: Exhaust

Within each group, diagrams are numbered sequentially. To find a part, first determine which group it belongs to, then locate the applicable diagram.

Reading the Parts Index

Each diagram has a callout number (small circle or square with a number). Below the diagram, a list matches each callout to a part number, description, and quantity. For example:

Callout | Part Number | Description | Qty 1 | 928 110 021 01 | Distributor cap | 1 2 | 928 110 421 02 | Rotor | 1

If the part number is superseded, the manual may show the new number in brackets or a footnote.

Ordering Parts

Once you have the part number, you can order from:

• Porsche Classic (if still available)
• Independent Porsche parts specialists (check 928-specific forums for trusted vendors)
• Dealer network (some dealers still can order older parts)

Note: Many rubber and plastic parts are now replaced with updated materials, but the parts manual still lists the original number. Cross-reference with vendor notes to get the correct updated part.

Tips for Restoration Projects

• Get the model-year-specific manual: 928s changed significantly between early and late models. The S4/GT/GTS shared many components, but earlier cars use different electrical and fuel injection parts.
• Pair with a service manual: Download a PDF of the factory service manual (available from the same sources) to have repair procedures alongside part numbers.
• Print key pages: Keep a binder of the most frequently referenced sections (engine, brakes, suspension) to avoid dirtying your laptop in the garage.
• Join the 928 community: Forums like Rennlist and the 928 Registry have members who can help decode part numbers or suggest modern equivalents.

Common Drawbacks of Parts Manuals

• Outdated part numbers: Some parts have been replaced multiple times. Always check with a vendor before ordering.
• Missing later revisions: If you own a 1995 GTS, the late-production manual may be hard to find. Supplement with dealer bulletins.
• Poor reproduction quality: Some digital copies are blurry or incorrectly scanned. Look for high-resolution PDFs.

Final Recommendation

For the serious 928 owner or restorer, invest in a digital copy of the factory parts manual that covers your specific model year. Supplement it with the factory service manual and a printed binder of the most-used diagrams. If you can find a clean original paper manual at a reasonable price, buy it—but the digital version is more practical for everyday use. Start your search with reputable Porsche specialty shops like Pelican Parts or 928 Motorsports, and always cross-reference part numbers with current availability. With the right manuals, your 928 will stay on the road for decades.