Vaico V20-1592 Engine Water Pump Pulley

Engine Water Pump Pulley for BMW Cooling Service

This Vaico engine water pump pulley is built for BMW cooling system service where the original pulley shows wear, wobble, or belt tracking issues. It is a direct-fit replacement for select BMW 318i, 318is, 318ti, and Z3 applications with a 6-rib belt profile.

Key Features

• Brand: Vaico, VAICO product line
• Part number: V20-1592
• Engine water pump pulley for belt-driven cooling system applications
• 123 mm diameter with 70 mm height
• 142 mm width and 143 mm length
• 6-rib design for ribbed V-belt routing
• Lightweight construction at 0.236 kg
• Cross-reference part number: 11511717637

Detailed Description

Vaico V20-1592 is an engine water pump pulley made for BMW models that use a ribbed V-belt drive. The pulley measures 123 mm in diameter, 70 mm in height, 142 mm in width, and 143 mm in length, giving you the dimensional match needed for proper belt alignment and water pump drive operation. The VAICO line focuses on OE-style replacement components for European vehicles, making this pulley a practical choice for cooling system repair on BMW 318i, 318is, 318ti, and Z3 models.

Compatible With BMW 318i, BMW 318is, BMW 318ti, and BMW Z3 applications listed below, this pulley is referenced to OE number 11511717637 and interchange numbers 1 739 527 and 11 51 1 739 527. Use V20-1592 when replacing a worn or damaged water pump pulley on BMW cooling system service jobs where correct rib count and pulley dimensions matter.

Vehicle Fitment

• Fits 1996-1999 BMW 318ti, N/A
• Fits 1996-1998 BMW 318i, N/A
• Fits 1996-1998 BMW Z3, N/A
• Fits 1996-1997 BMW 318is, N/A
• Fits 1995 BMW 318i, N/A
• Fits 1995 BMW 318is, N/A
• Fits 1995 BMW 318ti, N/A
• Fits 1994 BMW 318i, N/A
• Fits 1994 BMW 318is, N/A
• Fits 1991-1993 BMW 318i, N/A
• Fits 1991-1993 BMW 318is, N/A

What It Helps Address

• Worn or noisy water pump pulley surfaces
• Belt misalignment on ribbed V-belt systems
• Visible pulley damage, cracking, or runout
• Cooling system service where the original pulley no longer tracks correctly
• BMW belt drive repairs tied to OE number 11511717637

Installation Notes and Tips

Verify pulley diameter, rib count, and mounting dimensions against the removed part before installation. Confirm the vehicle’s build date and engine configuration, especially on 1994 BMW 318i and 318is applications where fitment notes split by production month. Inspect the belt, tensioner, and water pump condition during service so the new pulley runs true and maintains proper belt tracking.

Quality Assurance

Vaico supplies OE-style replacement parts for European vehicle applications, and this pulley is cataloged with direct OE and interchange references for accurate parts matching. Part number V20-1592 is listed for the BMW applications shown above.