Buy Discontinued Porsche Axle Parts: A Practical Guide

Finding discontinued Porsche axle parts can be a challenge, but it’s a task many owners face when restoring or maintaining older models. Whether you need half shafts, CV joints, or axle seals for a 911 from the 1970s or a 928 from the 1980s, factory parts are no longer produced by Porsche. This guide walks you through the options—OEM, NOS, aftermarket, and used—and provides practical advice for locating and purchasing these critical components. The goal is to help you make an informed decision without wasting time or money.

Understanding Discontinued Axle Parts

Porsche classifies parts as discontinued when they are no longer manufactured by the factory. This typically happens after a model has been out of production for 10–15 years, though some parts vanish sooner due to low demand. Axle parts are especially hard to find because they are wear items that also differ by model year and transmission type. For example, a 1973 911T has different half shafts than a 1974 911 with a 915 transmission. Knowing your exact part number is the first step to finding a replacement.

Why Part Numbers Matter

Every Porsche axle component has a unique OEM part number stamped on it. If you can read that number (often on the axle shaft or CV joint), you can cross-reference it against online parts catalogs or call suppliers. Without a part number, you risk buying the wrong item. For post-1970 cars, Porsche’s PET (Parts Electronically Catalogued) system is available online; it lists original part numbers and supersessions. For example, part 911.332.015.01 might have been replaced by 911.332.015.02. Always check supersessions before buying.

OEM vs Aftermarket vs Used

You have three main categories of parts to consider. Each has trade-offs in cost, availability, and quality.

OEM and NOS (New Old Stock)

Original Equipment Manufacturer (OEM) parts are the same as what Porsche installed at the factory. For discontinued items, only NOS remains—original parts that were never sold. These are the gold standard because they fit perfectly and meet Porsche’s specifications. However, NOS can be expensive and is drying up quickly. Many suppliers like Pelican Parts or Porsche Classic still carry some stock, but you may need to call multiple sources. NOS rubber parts (e.g., axle boots) may have aged and cracked, so inspect before buying.

Aftermarket Axle Parts

Several companies manufacture replacement axle parts for older Porsches. Brands like GKN, Lobro, and EMPI produce CV joints, boots, and complete half shafts that are direct replacements. Aftermarket parts are generally cheaper than NOS and readily available. However, quality can vary. Some aftermarket CV joints use hardened steel that equals OEM, while others may fail prematurely. Stick to reputable brands that specialize in European cars. Avoid no-name eBay listings unless you have verified feedback. Aftermarket is a good choice if NOS is unavailable or if you are building a driver, not a concours car.

Used Axle Parts

Salvage yards and online forums are the main sources for used axle parts. This is the least expensive option, but the risk is high. A used CV joint may have hidden wear, corrosion, or damage from a wreck. If you go this route, ask the seller for photos of the splines and grease condition. You can also measure runout on a half shaft if you have the tools. Some Porsche-specific salvage yards (e.g., Parts Heaven or 911 Salvage) sell used parts with a warranty. Used is acceptable for low-mileage cars or as a temporary fix, but for a long-term solution, new parts are safer.

Where to Buy Discontinued Porsche Axle Parts

You need to know where to look. The following sources are the most reliable for discontinued axle components.

Porsche Dealerships and Porsche Classic

Your local Porsche dealer can still order some NOS parts, especially if they are listed in the Porsche Classic catalog. Porsche Classic has been reproducing select parts for older models, including some drivetrain components. Call the parts department and give them the part number. They can check national inventory. Be prepared for high prices, but you get a genuine part with a warranty.

Specialized Porsche Parts Retailers

Online retailers like Pelican Parts, Sunset Porsche Parts, and EBS Racing (also known as Porsche Parts) stock a wide range of OEM and aftermarket axle parts. These businesses have relationships with suppliers and often have access to NOS that dealers no longer carry. Their websites let you filter by model and year. Use their live chat or phone support to verify fitment before ordering. Many also sell rebuilt half shafts with new CV joints—a cost-effective option.

Porsche Forums and Classifieds

Forums like Rennlist, Pelican Parts Community, and 911Pelican have classified sections where enthusiasts sell new old stock or used axle parts. This is a good place to find rare parts that aren’t listed anywhere else. You’ll need to be quick and ask detailed questions. Check the seller’s reputation and ask for the part number. Be cautious with private sales—use PayPal Goods and Services for protection.

Independent Porsche Shops

Mechanics who specialize in Porsche often have connections to suppliers or stockpile parts from projects. Call a few shops in your area and ask if they have the axle part you need. They may have used parts pulled from cars they dismantled. Some shops also offer core exchange programs where you trade your old axle for a rebuilt unit at a lower cost.

Key Considerations When Buying

To avoid costly mistakes, keep these points in mind.

Confirm Fitment by Year and Transmission

Porsche changed axle designs frequently. For example, the 1987 911 Turbo has different half shafts than a 1989 911 Turbo. Always verify the part fits your specific year, model, and transmission type (e.g., 915, G50, tiptronic). Use VIN-specific catalogs from the dealer or online resources like Pelican Parts’ fitment guide.

Inspect Rubber and Grease

If you buy a used or NOS axle boot, check for cracks and brittleness. Rubber degrades over time, even in storage. For CV joints, ensure the grease is not dried out or contaminated. A CV joint that feels rough when turned may be failing. New aftermarket CV joints come pre-greased with the right lubricant—stick to the specified grease type to avoid noise.

Consider Rebuilding vs. Replacing

Sometimes you can rebuild your existing axle by replacing just the boots and CV joints. This is cheaper than a complete half shaft and retains the original drive flanges. Rebuild kits are available from brands like GKN and Porsche. If the axle shaft itself is worn or bent, then a full replacement is necessary. A machine shop can test shaft runout for you.

Watch Out for Counterfeit Parts

As demand for discontinued parts rises, counterfeit products appear online. Counterfeit CV joints may have softer metal or incorrect dimensions. Buy from authorized dealers or well-known retailers. If a price is too good to be true, it probably is. Genuine Porsche packaging has specific labels and part numbers—compare with photos on Pelican Parts or the dealer’s site.

Final Recommendation

For most owners, the best approach is to start with a call to a specialized retailer like Pelican Parts or your local Porsche dealer. Give them the part number from your car. If NOS is available and within your budget, buy it—especially for components that affect safety like axle shafts. If NOS is too expensive or unavailable, go with a quality aftermarket brand (GKN or similar) from a reliable seller. Avoid used unless you are on a strict budget and can inspect the part in person. Rebuilding your old axle with new boots and CV joints is a solid third option if the shafts are straight.

Write down your part numbers, check supersessions, and don’t rush. With patience, you can find the right discontinued Porsche axle part and keep your car on the road for many more miles.