Bosch SR0446X Starter Motor

Reliable Starter for BMW Models

The Bosch Starter (Remanufactured) SR0446X is designed to provide dependable starting power for select BMW vehicles. Engineered to meet original equipment specifications, this 12-volt starter ensures consistent performance for models like the BMW 530i, 540i, 740i, 740iL, 840Ci, M5, X5, and Z8.

• Voltage: 12V for standard automotive electrical systems
• Power Rating: 1.7 kW for efficient engine cranking
• Mounting Bolt Hole Quantity: 2 for secure installation
• Nose Cone Material: Aluminum with a closed nose design
• Starter Rotation: Clockwise to match OEM requirements
• Solenoid Attached for integrated operation
• Tooth Quantity: 9 for proper engagement with flywheel
• Remanufactured unit with OE recommendation

About the Bosch Starter (Remanufactured) Product Line

The Bosch Starter (Remanufactured) line offers remanufactured starters that meet original equipment manufacturer standards. These units are rebuilt using quality components and tested to ensure reliable starting performance. The SR0446X model is part of this line, providing a cost-effective alternative to new starters without compromising on durability or fitment for BMW vehicles.

Detailed Product Description

This Bosch SR0446X starter features a robust aluminum closed nose cone that protects internal components from debris and moisture. The clockwise rotation and 9-tooth pinion gear are designed to match the specifications of various BMW engines, ensuring smooth engagement and reliable engine starts. With a power rating of 1.7 kW, this starter delivers sufficient torque to crank engines efficiently. The unit includes an attached solenoid for seamless electrical operation, although mounting hardware and shims are not included.

Common Applications and Issues Addressed

• Replacement for faulty or worn-out starters in BMW 530i, 540i, 740i, 740iL, 840Ci, M5, X5, and Z8 models
• Resolves intermittent or no-start conditions caused by starter failure
• Addresses slow engine cranking due to starter motor wear
• Eliminates grinding noises from improper starter engagement
• Restores reliable starting performance in remanufactured units

Installation Notes and Tips

Ensure the vehicle battery is fully charged before installation. The SR0446X starter requires two mounting bolts for secure attachment; verify bolt torque specifications according to BMW service manuals. Since mounting hardware and shims are not included, reuse existing components or source replacements as needed. Confirm the starter rotation is clockwise to match your vehicle’s engine setup. Proper alignment of the starter’s 9-tooth pinion with the flywheel is critical for smooth operation.

Quality Assurance and Warranty

This Bosch remanufactured starter is built to meet OE recommendations, ensuring compatibility and performance. Each unit undergoes rigorous testing to verify electrical and mechanical function. Warranty coverage details should be confirmed at the point of purchase, reflecting Bosch’s commitment to quality and reliability in automotive electrical components.