Porsche 944 S2 Parts Catalogue: Your Complete Guide to Sourcing Quality Components

The Porsche 944 S2 is a beloved front-engine, rear-wheel-drive sports car that debuted in 1989. With its 3.0-liter, 16-valve inline-four engine producing 211 horsepower, it outperformed its predecessor and earned a loyal following. However, as these cars age, finding the right replacement parts becomes essential. The Porsche 944 S2 parts catalogue is your primary tool for identifying, ordering, and installing correct components. This guide explains everything you need to know: how to interpret the catalogue, where to find part numbers, what to watch for, and practical tips for keeping your 944 S2 on the road.

Understanding the Porsche 944 S2 Parts Catalogue

The official Porsche parts catalogue (ETKA or PET) is a comprehensive database that lists every original part used on the vehicle. It is organized by vehicle model, model year, and assembly group. For the 944 S2, the catalogue covers components for the 1989 and 1990 model years, including the coupe and the rare cabriolet. You can access the PET online through various Porsche enthusiast sites or purchase a DVD from specialized vendors. Some dealerships also have digital copies they can query for you.

How to Read Part Numbers

Each part in the catalogue is assigned a unique 10- to 11-digit number. The format is typically: 944 x.xx.xxx. For example, the oil filter for the 944 S2 is 944-107-201-00. Here is how to break it down:

• 944: Model designation (944 series)
• 1: Main group (e.g., engine, suspension)
• 07: Sub-group (e.g., lubrication system)
• 201: Specific part identifier
• 00: Variant (often color or revision)

Understanding this structure helps you verify compatibility across different years or trims. Always double-check that the part number corresponds to your car’s VIN, especially for engine management or body panels.

Assembly Groups and Sections

The catalogue is divided into numbered groups:

• Group 1: Engine
• Group 2: Fuel and exhaust system
• Group 3: Transmission
• Group 4: Front axle / steering
• Group 5: Rear axle
• Group 6: Brakes / wheels
• Group 7: Clutch / pedals
• Group 8: Body (doors, hood, fenders)
• Group 9: Electrical system
• Group 0: Miscellaneous (tools, labels, decals)

Each group is further split into sub-groups. For instance, Group 1 includes 01 (cylinder head), 02 (crankshaft/pistons), 03 (oil pump), etc. This hierarchical layout makes it easy to browse by system.

Key Components and Their Part Numbers

While every part matters, some are especially important for reliability and performance. Here are common replacement components for the 944 S2, along with their official part numbers (always confirm with your VIN):

Engine & Cooling

• Timing belt kit: 944-102-301-00 (belt) plus related tensioners and rollers (944-102-341-00, 944-102-343-00)
• Water pump: 944-106-011-00 (later revision with better bearings)
• Thermostat: 944-106-081-00
• Oil filter: 944-107-201-00 (also used on many other Porsche models)
• Radiator: 944-106-029-01 (coupe) or 944-106-029-02 (cabriolet)

Brakes & Suspension

• Front brake pads: 944-351-941-00 (ATE or Brembo)
• Rear brake pads: 944-352-941-00
• Brake rotors: Front 944-351-401-01 (vented) and Rear 944-352-401-00
• Shock absorbers: Front 944-343-031-08 (Bilstein) or 944-343-031-09 (Sachs)
• Sway bar bushings: Front 944-343-703-00, Rear 944-333-703-00

Electrical & Sensors

• Engine control unit (ECU): 944-618-111-00 (DME for 944 S2)
• Crankshaft position sensor: 944-606-012-00
• Fuel pump: 944-608-102-01 (in-tank) or 944-608-102-02 (external on later models)

Body & Interior

• Headlight assembly: Left 944-631-111-00, Right 944-631-112-00 (H4 version)
• Door handle: Exterior 944-531-115-00 (left) and 944-531-116-00 (right)
• Window regulator: 944-537-011-00 (coupe door)
• Seat upholstery: Part numbers depend on color and material; check Individual Options

Sourcing Parts: OEM vs. Aftermarket

The parts catalogue is the gold standard for OEM (Original Equipment Manufacturer) parts. These are made to Porsche specifications and ensure perfect fit and longevity. However, certain aftermarket parts are widely accepted within the 944 community. For example:

• Suspension: Bilstein and Koni are popular alternatives to OEM Sachs or Boge.
• Brakes: Brembo supplies the original calipers, so their aftermarket pads (HP1000) are a direct upgrade.
• Engine gaskets: Elring or Victor Reinz are OEM-grade.

Caution: Some online listings claim fitment without checking the catalogue. Always cross-reference the part number with your VIN or a PET lookup. Avoid generic parts for safety-critical items like timing belts, water pumps, and brake components.

Where to Buy

• Porsche dealerships: Full support but highest prices; good for rare or no-longer-stocked items.
• Specialist Porsche parts suppliers: Companies like Pelican Parts, 944 Online, and Only944 stock genuine and aftermarket parts. They often have detailed photos and numbered guides.
• Online forums: The Rennlist and 924/944 forums have classified sections where owners sell used or NOS parts. Be sure to ask for part numbers.
• Junkyards and dismantlers: Specialty Porsche dismantlers (e.g., Parts Heaven, Porsche Recycling) can source used parts if you supply the number.

Common Pitfalls When Using the Parts Catalogue

1. Model year differences: The 944 S2 had subtle changes during its two-year run. For example, early 1989 cars used a different fuel pressure regulator than late 1990 models. Always use your VIN to confirm.
2. Supersessions: Porsche frequently updates part numbers. A number like 944-106-011-00 may have been replaced by 944-106-011-01. Check the supersession history to get the latest version.
3. Mislabeled parts on resale sites: Sellers sometimes mis-categorize parts. A part labeled “944 S2” might actually be for a 944 Turbo. Verify the full numbers.
4. Incomplete kits: Some “timing belt kits” omit the water pump or tensioner pulley. Compare the kit contents with the catalogue listing for your car.

Tips for Restoration or Repair Using the Catalogue

• Create a master parts list: When planning a major service (timing belt, clutch, suspension overhaul), write down every part by group from the catalogue. This helps avoid ordering twice and missing small items.
• Use the PET online: Several free websites let you browse the PET by model. These often include exploded diagrams—invaluable for understanding how parts assemble.
• Reference the parts catalogue for torque specs: While not always listed, many part pages include torque values for fasteners. Use them during installation.
• Join a community: Clubs like PCA (Porsche Club of America) have members who share their saved PET links and can help decode tricky numbers.

Final Recommendation

Your best approach for Porsche 944 S2 parts is a three-step process:

1. Get the official parts catalogue (PET). Download a free copy from a trusted enthusiast site or use an online PET viewer. This is your definitive reference.
2. Cross-reference every part number before ordering. Double-check with your VIN, especially for engine, transmission, and body parts.
3. Build relationships with one or two reliable suppliers. Use specialist Porsche vendors for critical engine and brake parts, and consider well-regarded aftermarket brands for suspension and cosmetics.

By leveraging the parts catalogue correctly, you’ll avoid costly mistakes and keep your 944 S2 running exactly as Porsche intended. Whether you’re performing a full restoration or just a routine oil change, the catalogue is your best friend.