Continental 49311 Accessory Drive Belt Tensioner Assembly - Air Conditioning

Accessory Drive Belt Tensioner for BMW A/C

Continental Multi-V part number 49311 is an accessory drive belt tensioner assembly for BMW air conditioning applications. It is built with Accu-Drive technology to maintain steady belt tension, reduce vibration, and keep the belt aligned as the system wears.

For BMW M3, 330i, 325i, 525i, X5, Z3, and related models, this tensioner supports smooth Multi-V belt operation in the A/C drive system. Continental 49311 is engineered to meet or exceed OEM fit and performance expectations.

Key Features

• Accessory drive belt tensioner assembly for air conditioning applications
• Continental Multi-V line replacement part
• Accu-Drive torsion-spring design helps dampen belt vibration
• Maintains constant belt tension and alignment as the belt wears
• 1 smooth, non-flanged thermoplastic pulley
• Pulley dimensions: 2.76 in. outside diameter, 1.02 in. width, 0.670 in. bore diameter

Product Details

Continental 49311 is a direct-fit style tensioner assembly for BMW accessory drive belt systems using a smooth pulley and Multi-V belt. The round torsion spring design helps keep tension consistent, which supports quieter operation and more stable accessory drive performance. This part cross-references Gates 38224 for the same application.

Compatible With BMW applications including 2006-2008 Z4 A/C, 2001-2006 M3 A/C, 2001-2003 330i A/C, 2001-2003 330xi A/C, 2001-2002 325Ci A/C, 2001-2002 325i A/C, 2001-2002 325xi A/C, 2001-2002 330Ci A/C, 2001-2002 525i A/C, 2001-2002 530i A/C, 2001-2002 X5 A/C, 2001-2002 Z3 A/C, 2000-2001 323i A/C, 2000 323Ci A/C, 1999-2000 323ti A/C, 2000 328Ci A/C, 1999-2000 328i A/C, 1999-2000 528i A/C, and 1998-1999 323is A/C. BMW M3, BMW Z4, and BMW 330i fitment is listed for air conditioning drive use with smooth pulley Multi-V configurations.

Common Issues This Part Addresses

• Belt flutter or vibration in the accessory drive system
• Loss of proper belt tension as the belt ages
• Misalignment at the A/C belt path
• Squealing or inconsistent belt tracking
• Wear-related tensioner performance decline

Installation Notes

Verify pulley style, belt routing, and tensioner type before installation. This assembly is listed for smooth pulley, Multi-V air conditioning applications, including BMW models with automatic or mechanical tensioner configurations where noted in fitment. Confirm the mounting location and compare the original part number, pulley diameter, and bore dimensions before replacing the unit.

Quality Assurance

Continental designs this Multi-V tensioner assembly to meet or exceed OEM fit and performance requirements. The Accu-Drive spring design is intended to maintain alignment and tension control for consistent accessory drive operation.