Womala Crankshaft Timing Pulley OE 11237548003 for BMW Auto Engine Parts

Core Functions

• Synchronize crankshaft and camshaft rotation: The pulley’s precisely machined teeth engage with the timing belt/chain, transferring rotational force from the crankshaft to camshafts at a 2:1 speed ratio (critical for 4-stroke engines). This ensures valves open/close exactly when piston movement requires, preventing valve-piston contact (a major cause of engine damage) and maintaining efficient combustion.
• Maintain stable timing system operation: Its rigid material and accurate dimensions prevent tooth wear or deformation (even under high torque), avoiding timing drift (e.g., delayed valve opening) that leads to poor fuel economy, increased emissions, or rough engine performance.
• Support belt/chain tension: The pulley’s smooth, concentric outer surface (runout tolerance <0.1mm) ensures even contact with the timing belt/chain, reducing localized wear and extending the timing system’s service life (typically 80,000–120,000 miles for BMWs).

 Compatible Vehicles

1. “LCI” refers to BMW’s mid-generation update (e.g., E90 LCI: 2008–2013), which retains timing system compatibility with pre-LCI models of the same chassis.
2. For 100% fitment accuracy, confirm via the vehicle’s VIN (Vehicle Identification Number) to match the specific engine variant (e.g., 2.0L N46, 3.0L N52 petrol engines—this pulley is designed for petrol engines, not diesel variants).*

• Extensive Industry Experience: 13 years specializing in Volvo auto parts with precise product matching and technical solutions.
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