Porsche 928 Parts Catalog: Your Guide to Finding the Right Components

The Porsche 928 is a classic grand tourer that demands proactive maintenance and occasional repair. Whether you are restoring a 928S, upgrading a 928 GTS, or just keeping your daily driver on the road, a solid parts catalog is essential. This guide explains how to navigate the Porsche 928 parts catalog, understand part numbers, and source the right components for your project.

Understanding the Porsche 928 Parts Catalog

A parts catalog for the Porsche 928 is a structured listing of every component that makes up the vehicle. It is typically organized by vehicle system — such as engine, transmission, suspension, and electrical — and includes diagrams, part numbers, and descriptions. Using the correct catalog ensures you order the exact part that fits your chassis number and model year. The 928 underwent many changes from 1978 to 1995, so using a catalog specific to your car’s year range is critical.

OEM Parts Catalogs vs. Aftermarket Catalogs

An OEM (Original Equipment Manufacturer) parts catalog comes directly from Porsche or its official distributor. It lists only genuine Porsche parts, which are made to the original specifications. These catalogs are the gold standard for concours restorations and critical safety components. Aftermarket catalogs, on the other hand, compile parts from various manufacturers that are compatible with the 928. They often include cost-saving alternatives, such as rubber bushings or brake pads, that meet or exceed OEM quality without the Porsche price tag. For routine maintenance items, aftermarket catalogs are a practical choice. However, for engine internals or body panels, OEM is usually preferred.

How to Read Parts Diagrams

Parts diagrams are exploded views that show exactly how components fit together. Each part is numbered and corresponds to a list below the diagram. The list includes the part number, description, quantity required, and sometimes notes about application. To read them effectively, start by identifying the system you are working on (e.g., cooling system, fuel injection). Find the diagram that matches your car’s configuration. Match the visual shape and location of the part you need to the numbered callout. Then use that part number when ordering. Always double-check the part number suffix, as Porsche often released superseded versions (e.g., 928.106.401.01 vs. 928.106.401.02). The catalog will note if a part has been replaced.

Where to Find Genuine Porsche 928 Parts Catalogs

Porsche does not publish comprehensive online parts catalogs for free, but authorized dealers and specialized retailers offer access. The best source is the official Porsche PET (Parts and Technical Information) system, which is the same database used by dealerships. Some independent Porsche parts suppliers provide online catalogs that let you search by part number or vehicle model. Additionally, many 928 enthusiast clubs and forums maintain libraries of scanned factory parts manuals. These are invaluable for off-line reference. You can also order a printed catalog from a reputable Porsche parts distributor. Be aware that printed catalogs are often model-year-specific, so buy the one that covers your car.

Using Online Parts Catalogs Effectively

Online parts catalogs are convenient but require careful navigation. First, enter your vehicle identification number (VIN) or select the exact model year and engine type. The 928 came with 4.5L, 4.7L, 5.0L, and 5.4L engines, each with unique parts. Once inside, use the search function with a part number if you have one, or browse by system. Pay attention to the "application" column: some parts fit multiple years, others are specific to a single year. For example, the front bumper changed in 1986. If the catalog shows multiple options, use the diagram to verify the shape. When you find the right part, note the OEM number and also check for aftermarket equivalents from brands like Lemförder, Febi Bilstein, or Elring. Many catalogs will list cross-references. Finally, check stock status. Some parts are discontinued and may require sourcing from specialists or used suppliers.

Top Parts to Have on Hand for Your 928

If you’re building a parts stash, focus on items that commonly fail or are hard to find. Timing belt kits (for pre-1985 models with interference engines) are critical. Water pumps, thermostat housings, and radiator hoses are susceptible to age. Fuel accumulators and fuel hoses are another weak point. Electrical switches, especially the ignition switch and window regulators, often need replacement. Suspension bushings and shocks wear out quickly. For the 928-specific parts, the interior door handles and seat recliner mechanisms are prone to breakage. Keep a set of spare fuses and relays, as the electrical box under the hood is known for corrosion. Also stock the famous "928 special" parts like the harmonic balancer and the oil pressure sender.

Common Part Numbering Systems

Porsche part numbers follow a 14-character alphanumeric format: xxx.xxx.xxx.xx. The first three digits represent the model group (e.g., 928 for the 928, 911 for the 911). The next three digits denote the subsystem (e.g., 106 for engine block, 201 for exhaust). The following three digits identify the specific part. The last two digits indicate the variant or revision. For example, 928.106.401.01 is a cylinder head gasket. When looking up parts, use the full number including periods. If a part number starts with 999, it is a standard hardware item (like bolts or nuts). Understanding this system helps you cross-reference parts across different catalogs and avoid ordering the wrong item.

Final Recommendations

For anyone maintaining a Porsche 928, owning the correct parts catalog is non-negotiable. Start by obtaining an OEM catalog for your specific model year. The PET system is the most reliable, but printed manuals are excellent backups. Use diagrams to identify parts visually and always verify part numbers with multiple sources. When cost is a concern, compare aftermarket catalogs for non-critical parts. For rare or discontinued items, join enthusiast forums and network with specialty suppliers. A well-organized approach to using the Porsche 928 parts catalog saves time, money, and frustration. Prioritize common failure points in your spares collection and always double-check compatibility. With the right catalog and a bit of patience, you can keep your 928 running strong for many more miles.