Porsche 964 Injector Part Number: A Complete Guide to OEM and Replacement Options

If you own a Porsche 964 (1989–1994 911) and need to replace the fuel injectors, you’ve likely run into confusion about the correct part number. The 964 uses a Bosch fuel injection system that changed slightly across model years and engine variants. Using the wrong injector can cause poor idle, misfires, or even engine damage. This guide covers the OEM Bosch part numbers, common aftermarket alternatives, and what to consider when buying replacements.

Why the Correct Injector Part Number Matters

Fuel injectors control the air-fuel mixture entering the cylinders. On a 964, the Bosch Motronic 2.1 system (for US cars from 1990–1992) and later 2.10.1 (1993–1994) are sensitive to injector flow rate, impedance, and spray pattern. An incorrect injector can trigger check engine lights, cause rough running, or fail emissions tests. Using the wrong impedance injector (high vs. low) can damage the ECU driver.

OEM Bosch Injector Part Numbers for the Porsche 964

1989–1992 Carrera 2/4 (3.6L M64.01/M64.02)

The standard injector for these years is:

• Bosch 0 280 150 209 (also known as Bosch 209 injector)
• Porsche part number: 964 606 116 00

This is a high-impedance (12 ohm) injector with a flow rate of approximately 190–200 cc/min at 3 bar. It’s the direct replacement for all US-market 964s through 1992.

1993–1994 Carrera 2/4 (OBD I update)

For the final two model years, Bosch changed to a slightly different injector:

• Bosch 0 280 150 216 (Bosch 216 injector)
• Porsche part number: 964 606 118 00

This injector has a higher flow rate (around 215 cc/min) and a fine-tuned spray pattern to meet stricter emissions. It is backward compatible in some applications but requires ECU mapping adjustments for optimal performance.

964 Turbo (1991–1994, 3.3L and 3.6L)

The 964 Turbo uses a different part due to higher fuel demand:

• Bosch 0 280 150 210 (Bosch 210 injector)
• Porsche part number: 964 606 117 00 (or superseded to 964 606 119 00)

These are also high-impedance but flow around 250–270 cc/min. The 3.6 Turbo (1993–1994) uses the same part as the 3.3 Turbo.

Aftermarket and Upgrade Options

Many 964 owners upgrade injectors for performance or to replace discontinued OEM parts. Here are common alternatives:

Bosch EV1 and EV6 Series Injectors

The OEM injectors are EV1 style (top-feed, high-impedance). Newer EV6 injectors are more compact and have better atomization. However, they require adapter connectors and sometimes spacer modifications. Popular upgrades:

• Bosch 0 280 155 749 (EV6 210 cc/min, similar to 216)
• Bosch 0 280 155 781 (EV6 280 cc/min, for mild performance)

Remanufactured OEM Injectors

You can send your original injectors to a shop like RC Engineering or Marren for cleaning and flow testing. They replace the internal components and restore performance for a fraction of the cost of new injectors. Always ask for a flow report to verify.

Aftermarket Brands (VDO, Genuine, etc.)

Some aftermarket brands offer direct-fit injectors that match OEM specs. For example, VDO (Siemens) makes a replacement for the 209 injector (part number A2C59512816). These are usually reliable but ensure they include the correct O-rings and retainers.

How to Choose the Right Injector

1. Verify your engine and year. US 964s from 1989–1992 use the 209 injector; 1993–1994 use the 216. Check your VIN or engine stamp to be sure.
2. Check impedance. All 964 injectors are high-impedance (12 ohms). If you see low-impedance (2–3 ohms) injectors, they will not work without an added resistor box.
3. Consider upgrades carefully. If you install higher-flow injectors, you will need a chip tune or ECU reprogramming to adjust the air-fuel ratio. Otherwise, the engine will run rich and may fail emissions.
4. Inspect the condition. Old injectors often have clogged pintles or cracked insulation. Before buying new, test yours with a multimeter (should read 11–13 ohms) and listen for clicking when applying battery voltage.

Common Mistakes to Avoid

• Mixing injector types. Never mix 209 and 216 injectors on the same engine. The flow difference will cause cylinder imbalance.
• Forgetting the O-rings and retainers. Each injector needs two O-rings (upper and lower) and a metal retaining clip. These are often sold separately. Porsche part numbers: upper O-ring 999 707 323 00, lower O-ring 944 606 116 00, retainer 964 606 133 00.
• Using 996/997 injectors. Later water-cooled injectors have different connectors and rail dimensions. They are not plug-and-play.

Practical Replacement Tips

• Always replace all injectors at once for balanced operation.
• Clean the intake manifold ports while the injectors are out.
• Use a small amount of silicone grease on the O-rings to prevent tearing.
• Torque the fuel rail bolts to 8–10 Nm; overtightening can warp the rail.
• After installation, prime the fuel pump several times (key on/off) before starting, and check for leaks.

Final Recommendation

For most 964 owners, the smartest choice is to buy new OEM Bosch injectors from a reputable parts supplier like Pelican Parts, FCP Euro, or directly from Bosch. If your car is a 1990–1992, order Bosch 0 280 150 209 (Porsche 964 606 116 00). For 1993–1994, use Bosch 0 280 150 216 (Porsche 964 606 118 00). Avoid generic non-Bosch brands unless you can verify flow and impedance specs. If you want a mild performance upgrade (like a chip tune), consider EV6 injectors with known flow rates and ensure your tuner can recalibrate the ECU. Always keep documentation of the part numbers you install—future owners will thank you.