PCV Check Valve 03C103175B / 03C103175J for VW Lavida, Polo, Passat & Skoda Octavia

PCV Check Valve — 03C103175B / 03C103175J

A small part that makes a big difference. This PCV (Positive Crankcase Ventilation) check valve regulates crankcase pressure and prevents oil vapors from flowing back into the intake system. When this valve fails, you may notice rough idling, increased oil consumption, or even engine misfires. Replacing it with a quality part restores smooth, efficient engine operation.

Compatible Part Numbers

• 03C103175B
• 03C103175J

Compatible Vehicles

• Volkswagen Lavida
• Volkswagen Polo
• Volkswagen Passat
• Skoda Octavia

Symptoms of a Failing Check Valve

• Rough or unstable idle
• Increased oil consumption or oil leaks
• Check engine light (P-codes related to crankcase ventilation)
• Whistling or hissing noise from the engine bay

Product Highlights

• ✅ Direct OEM replacement — plug-and-play installation
• ✅ Restores proper crankcase ventilation and engine pressure balance
• ✅ Durable construction for long service life
• ✅ Compatible with both 03C103175B and updated 03C103175J part numbers
• ✅ Helps prevent oil leaks and protects engine internals

Recommended as part of routine engine maintenance. Easy DIY installation — no special tools required.