Bosch SR443X Starter Motor

Bosch SR443X Remanufactured Starter

The Bosch SR443X is a remanufactured 12-volt starter built for dependable cranking performance in select BMW applications. It features a clockwise rotation, integrated solenoid, aluminum nose cone, and a closed nose design for a direct-fit replacement approach.

Designed for BMW 325is, 325i, 325iX, 525i, 528e, 325e, and 325es applications, this Bosch starter is an OE-recommended replacement that follows the original equipment layout for the listed vehicles. The SR443X part number is also referenced in interchange listings for related BMW starter applications.

Key Features

• 12-volt remanufactured starter for select BMW models
• 1.4 power rating for starting-system service
• Clockwise starter rotation
• Integrated solenoid attached
• Aluminum nose cone with closed nose design
• 9-tooth drive configuration
• 2 mounting bolt holes
• OE recommendation status for listed applications

Product Details

Bosch Premium Starters are remanufactured, built, and tested to support consistent starting performance and reliability. The SR443X is engineered as a direct replacement starter for the specified BMW 3 Series and 5 Series applications, including 1987-1994 BMW 325is, 1987-1993 BMW 325i, 1988-1991 BMW 325iX, 1989-1991 BMW 525i, 1987-1988 BMW 528e, 1987 BMW 325e, and 1986-1987 BMW 325es. It also fits 1987 BMW 325e from 12/1986.

This Bosch SR443X starter cross-references BMW OE numbers 12411719999 and 12411726504 for the same application.

Common Starting Issues It Can Address

• Slow or weak engine cranking
• No-crank condition when the key is turned
• Intermittent starter engagement
• Grinding or inconsistent starter drive operation
• Starting-system failure on listed BMW models

Installation Notes

Verify the vehicle’s original starter configuration before installation, including 12-volt system requirements, clockwise rotation, 9-tooth drive, and the 2-bolt mounting pattern. Mounting hardware and shims are not included, so reuse or source the correct hardware as needed. Confirm fitment by year, model, and engine application before replacing the starter.

Quality Assurance

Bosch remanufactured starters are built and tested to meet application-specific performance and reliability expectations. The SR443X is an OE-recommended starter for the listed BMW fitments and is backed by Bosch’s remanufactured product standards.