Drive Belt Idler Pulley for BMW N55 Engine 11287557851 2009-2013 135i 335i X1 35i

Description

Maintain proper accessory drive belt alignment with this idler pulley designed for BMW N55 engine platforms. It serves as a direct replacement for the specified OEM reference and supports reliable operation of the belt system on compatible 1-Series, 3-Series, and X1 models.

Key Features

• Replacement idler pulley for BMW N55 engine drive belt systems.
• Interchanges with OEM reference 11287557851.
• Compatible with 2009-2013 BMW 135i (E82/E88) and 335i (E90/E92).
• Also fits BMW X1 35i models with N55 powertrain.
• Engineered to maintain factory belt routing and tension specifications.

Technical Specifications

Package Includes

• 1 x Drive Belt Idler Pulley

FAQ

Q: Will this fit my 2011 BMW 335i Sedan?

A: This pulley is designed for N55 engine applications from 2009-2013. Verify your vehicle has the N55 engine code before ordering.

Q: Is this the tensioner pulley or a fixed idler?

A: This is an idler (deflection) pulley for the drive belt system. It does not include the tensioner assembly or damping mechanism.

Q: Does this include the mounting bolt?

A: Package contents typically include the pulley only. Reuse your original mounting hardware or source a new bolt separately if needed.

Q: Which belt does this pulley guide?

A: This pulley services the main accessory drive belt system on N55 engines, supporting proper routing for the alternator, A/C, and other accessories.