Bosch Distributor Cap for Porsche 911/930 (1978–1989)

This Bosch Distributor Cap is a direct-fit replacement for Porsche 911 and 930 applications listed in the fitment table below. It provides the tower layout and insulation needed to route coil output to each plug wire in the correct firing order. Bosch has been a global leader in automotive technology since 1886, pioneering innovations like electronic fuel injection and oxygen (lambda) sensors that shaped modern engine management. Today, Bosch supplies OEM-quality sensors, engine electronics, ignition components, and braking parts found in vehicles worldwide. Known for precision engineering and reliable performance, Bosch parts are built to factory specifications for dependable fitment and long-term durability.

Cracks, carbon tracking, or worn terminals inside the cap can lead to misfire, crossfire, and hard-start complaints. A fresh cap is a basic maintenance item on distributor-equipped cars.

Technical Details

• Manufacturer part number: 1-235-522-053
• Part type: Distributor cap
• 6-cylinder Bosch cap for distributor-equipped Porsche applications in the table below
• Commonly linked to Porsche OE references 93060290400 / 93060290401

Fitment & Compatibility

Use the fitment table below to confirm year and submodel coverage across 911 and 930 applications.

If you need help sorting out the correct part for your Porsche, send us your VIN. We have been helping Porsche owners and shops with fitment questions for over 20 years, and the small details still matter because they do.