Vaico V20-0034 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for BMW

The Vaico V20-0034 engine coolant reservoir cap is a direct-fit replacement for BMW cooling system service where the reservoir cap must maintain proper pressure. With an M52 x 3 thread size and a 1.4 bar pressure rating, it supports stable coolant system sealing for a wide range of BMW 3 Series, 5 Series, 7 Series, X models, and performance applications.

VAICO focuses on OE-style replacement parts for European vehicles, and this VAICO cooling component is built around the reservoir application specified in the fitment data. The V20-0034 is a practical choice when replacing a worn or leaking BMW coolant expansion tank cap.

Key Features

• Part number: V20-0034
• Engine coolant reservoir cap with M52 x 3 thread size
• Pressure rating: 1.4 bar
• Outer diameter: 88 mm
• Length: 86 mm
• Height: 47 mm
• Fits reservoir location applications listed for BMW models
• Cross-reference: Febi-Bilstein 36737

Detailed Description

This BMW coolant reservoir cap is specified for reservoir-location use across many BMW applications, including 2017 BMW 230i, 2015-2017 BMW 320i, 2017 BMW 530i, 2015-2017 BMW X3, and 2015-2017 BMW X5. The V20-0034 uses an M52 x 3 thread and a 1.4 bar pressure setting to match the cooling system requirements listed in the product data. For buyers searching for a BMW expansion tank cap, BMW coolant reservoir cap, or VAICO V20-0034 replacement, this part provides a fitment-focused solution for the listed vehicles.

What It Helps Address

• Coolant loss from a cap that no longer seals properly
• Pressure control issues at the expansion tank or reservoir
• Cracked, worn, or damaged coolant reservoir cap threads
• Cooling system service on BMW models with reservoir-mounted caps
• Replacement of a missing or incorrect cap on the expansion tank

Installation Notes and Tips

Verify the thread size, pressure rating, and reservoir application before installation. Confirm the cap seats fully on the expansion tank and inspect the sealing surface for damage, debris, or coolant residue. This part fits the reservoir location on the listed BMW applications, including BMW 228i, BMW 328i, BMW 528i, BMW 740i, BMW X1, BMW X3, BMW X5, and BMW X6 model coverage shown in the fitment data.

Quality Assurance

VAICO supplies OE-style replacement components for European vehicle maintenance, and the V20-0034 is cataloged with direct interchange references for cross-checking during parts lookup. Confirm fitment against the vehicle’s cooling system specifications before ordering.