Vaico V10-2591 Engine Crankcase Vent Valve

Engine Crankcase Vent Valve for Volkswagen Applications

The Vaico V10-2591 is a pressure-controlled engine crankcase vent valve for the cylinder head in emission control and crankcase ventilation service. Built with a Polyamid 6.6 housing, it is specified for Volkswagen Golf, Jetta, and Beetle applications across model years 1998-2004.

VAICO product line components are developed for European vehicle service needs, with application-specific fitment and OE-style replacement focus. This crankcase breather valve is a direct service part for maintaining proper crankcase ventilation performance on the listed Volkswagen models.

Key Features

• Part number V10-2591 for crankcase ventilation service
• Pressure controlled breather valve design
• Fits at the cylinder head
• Polyamid 6.6 housing for durable under-hood use
• Dimensions: 112 mm length, 86 mm width, 52 mm height
• Recommended replacement interval: 60,000 km or 3 years
• Fits Volkswagen Golf, Jetta, and Beetle applications from 1998-2004

Detailed Description

The Vaico V10-2591 engine crankcase vent valve regulates crankcase pressure through a pressure-controlled breather valve design. It is positioned at the cylinder head and is intended for emission control service where stable crankcase ventilation is required. The compact Polyamid 6.6 housing and OE-style dimensions support a direct replacement approach for Volkswagen Golf, Volkswagen Jetta, and Volkswagen Beetle models listed in the fitment data. This part number V10-2591 is also referenced in cross-application catalogs for the same service use.

This part cross-references Standard Ignition V422 for the same application.

What It Helps Address

• Excess crankcase pressure
• Oil vapor routing issues in the ventilation system
• Rough idle caused by ventilation valve wear
• Vacuum-related drivability concerns tied to crankcase ventilation
• Service replacement for aged breather valve components

Installation Notes and Tips

• Fits 1999-2004 Volkswagen Golf, N/A.
• Fits 1999-2004 Volkswagen Jetta, N/A.
• Fits 1998-2003 Volkswagen Beetle, N/A.
• Confirm the cylinder head mounting location and compare the original valve dimensions before installation.
• Inspect connected crankcase ventilation hoses and seals during service to avoid repeat faults.
• Follow the recommended replacement interval of 60,000 km or 3 years when planning maintenance.

Quality Assurance

VAICO supplies application-specific replacement parts for European vehicle maintenance, and this V10-2591 valve is built to match the listed Volkswagen fitment and service requirements.