Porsche 928 Parts: A Comprehensive Guide for Owners and Enthusiasts

If you own a Porsche 928, you already know it’s a unique blend of grand touring comfort and sports car performance. But keeping it on the road requires a steady supply of parts—both routine maintenance items and hard-to-find components. This guide covers everything you need to know about sourcing Porsche 928 parts, from OEM to aftermarket, along with practical advice for common repairs.

Understanding the Porsche 928 Parts Landscape

The 928 was produced from 1978 to 1995, so many parts are now considered obsolete or in limited supply. Some components are still available from Porsche through its Classic program, while others are reproduced by aftermarket specialists. Knowing which path to take can save you time and money.

OEM vs. Aftermarket Parts

Original Equipment Manufacturer (OEM) parts are made by the same suppliers that provided components for the factory. They offer guaranteed fit and performance but often come at a premium. For critical safety items like brakes, suspension bushings, and timing belts, OEM is a safe choice.

Aftermarket parts vary widely in quality. Some aftermarket manufacturers produce parts that exceed OEM specifications, while others may cut corners. Well-known aftermarket brands for the 928 include Roger, 928 Motorsport, and Pelican Parts. Always check reviews from other 928 owners before buying.

Common Porsche 928 Parts You’ll Need

Engine and Cooling System

• Timing belt and tensioner: The V8 engine is interference, so a broken belt can destroy the engine. Replace every 30,000–50,000 miles with OEM or high-quality aftermarket (e.g., Gates or ContiTech).
• Water pump: Often fails around 60,000 miles. Use a genuine Porsche replacement or a heavy-duty aftermarket version.
• Thermostat and housing: Plastic housings crack over time; upgrade to an aluminum housing from 928 Motorsport.
• Radiator: The original radiators develop leaks where plastic meets aluminum. All-metal aftermarket radiators (e.g., Koyorad) are a good upgrade.

Transmission and Drivetrain

• Automatic transmission mounts: Rubber mounts collapse, causing bad shifts and vibration. Polyurethane mounts from Roger provide longer life.
• Manual transmission clutch: For S4 and later cars, the factory clutch is adequate, but more robust aftermarket options exist for modified cars.
• Axle shafts: The original rubber boots fail, leading to grease leaks and joint wear. Replace with rebuilt units or aftermarket shafts with improved boots.

Suspension and Steering

• Shock absorbers: The original self-leveling rear shocks (for auto-leveling system) are no longer available; many owners convert to standard shocks. Koni and Bilstein make adjustable shocks for the 928.
• Sway bar bushings: Worn bushings cause clunks in corners. Polyurethane replacements are inexpensive and easy to install.
• Steering rack: The rack can develop internal leaks. Rebuild kits are available, or you can exchange for a remanufactured unit.

Electrical and Sensors

• Alternator: The factory alternator is known to fail due to heat. A rebuilt unit with high-output (140A) from a specialist like 928s R Us is recommended.
• Starter motor: Hard starting can be a weak solenoid. Rebuilt starters with better grounding are available.
• Oxygen sensors: On later models, sensors affect fuel mixture. Use Bosch or NTK sensors—exact OEM replacements.

Where to Buy Porsche 928 Parts

Specialty Online Retailers

• 928 Motorsport (based in the U.S.): Known for high-quality reproduction parts, upgraded engine components, and excellent customer support.
• Roger’s 928 Parts: A long-time supplier for everything from interior trim to drivetrain parts. They also offer technical advice.
• Pelican Parts: Carries a broad range of OEM and aftermarket 928 parts, often with detailed installation guides.

Porsche Classic Program

Porsche has a dedicated classic parts program for the 928. Many critical components are being reproduced to the original specifications. Order through your local Porsche dealer or check the online catalog.

Facebook Groups and Forums

While not a direct source, groups like "Porsche 928 Owners" and the Rennlist 928 forum are invaluable for finding rare used parts, getting advice on vendors, and even buying from fellow enthusiasts.

Tips for Buying Used Porsche 928 Parts

• Inspect carefully: Ask for detailed photos of the part, especially electronic modules and interior pieces. Rust and sun damage are common.
• Prefer parts from later model years (1990–1995) because they have numerous improvements. Many parts are directly interchangeable with earlier cars.
• Check for part numbers: Research the original part number and compare it to what’s being sold. Some sellers mislabel components.

Restoring a Porsche 928 on a Budget

Restoring a 928 doesn’t have to break the bank. Focus on mechanical reliability first: timing belt, water pump, tires, and brakes. Then address cosmetic items. Many used and aftermarket parts are affordable if you shop around. Consider buying a parts car to have a ready supply of components.

Final Recommendation

For most owners, a balanced approach works best: use OEM for critical safety and engine management parts, and choose high-quality aftermarket for wear items like bushings, shocks, and cooling system upgrades. Build relationships with a few trusted suppliers—like 928 Motorsport and Pelican Parts—and consult the Rennlist forum before making expensive purchases. Regular maintenance using the right parts will keep your 928 running strong for years to come.

Whether you’re tackling a full restoration or a simple fix, having a reliable source for Porsche 928 parts is essential. Invest in quality parts and don’t hurry the work; your 928 will reward you with a driving experience few other cars can match.