Engine PCV Valve Oil Separator Rubber Diaphragm Repair Kit for Bora Jetta Octavia Polo | Replaces 0311803A

Experiencing rough idle, oil leaks, vacuum leaks, or PCV valve issues?

This OEM-style PCV valve oil separator diaphragm repair kit is designed to restore proper crankcase ventilation and maintain stable engine performance.

Manufactured from durable heat-resistant rubber materials, this replacement diaphragm helps reduce vacuum leaks, oil consumption, and PCV-related engine issues under daily driving conditions.

Perfect for replacing cracked, hardened, leaking, or damaged factory PCV valve diaphragms.

✔ OEM-style aftermarket replacement
✔ Helps restore proper crankcase ventilation
✔ Durable heat-resistant rubber construction
✔ Designed to reduce vacuum leaks and rough idle
✔ Direct-fit installation
✔ No modification required

Compatible with selected models:

• Bora
• Jetta
• Octavia
• Polo

Reference OE Part Number:

• 0311803A

Package Includes:

• 1 × PCV Valve Diaphragm Repair Kit