Bosch SR0421X Starter Motor

Reliable Starter for Audi A4, A4 Quattro, and Volkswagen Passat

The Bosch Starter (Remanufactured) SR0421X is designed to provide dependable starting power for select Audi and Volkswagen models. Engineered to meet original equipment specifications, this 12-volt starter ensures consistent performance and durability for your vehicle's electrical system.

• Voltage: 12V for standard automotive electrical systems
• Power Rating: 1.1 kW delivering sufficient torque for engine cranking
• Mounting Bolt Hole Quantity: 2 for secure installation
• Nose Cone Material: Aluminum with a closed nose design for protection
• Starter Rotation: Clockwise to match OEM requirements
• Solenoid Attached: Yes, integrated for streamlined operation
• Tooth Quantity: 9 for proper engagement with the flywheel
• Remanufactured unit with OE recommendation for quality assurance

About the Bosch Starter (Remanufactured) Product Line

The Bosch Starter (Remanufactured) line offers remanufactured starters that meet original equipment manufacturer standards. These starters undergo rigorous testing and refurbishment processes to restore functionality and reliability. The SR0421X model is part of this line, providing a cost-effective alternative to new starters without compromising on performance or fitment for Audi A4, A4 Quattro, and Volkswagen Passat vehicles.

Detailed Product Description

This Bosch SR0421X starter features a durable aluminum nose cone with a closed nose type, enhancing protection against environmental elements. The clockwise rotation and 9-tooth pinion gear ensure proper meshing with the engine’s flywheel, facilitating smooth engine starts. With two mounting bolt holes, the starter secures firmly to the engine block. The integrated solenoid simplifies installation and operation, while the 1.1 kW power rating provides adequate torque for reliable engine cranking. This remanufactured starter is recommended by OE standards, making it a suitable replacement for your Audi or Volkswagen vehicle.

Common Applications and Issues Addressed

• Replacement for faulty or worn-out starters in Audi A4, A4 Quattro, and Volkswagen Passat
• Resolves intermittent or no-start conditions caused by starter failure
• Addresses slow engine cranking due to starter motor wear
• Fixes starter solenoid engagement problems
• Eliminates grinding noises from starter gear misalignment

Installation Notes and Tips

Ensure the vehicle battery is fully charged before installation. This starter requires two mounting bolts; verify bolt condition and torque specifications during installation. Since mounting hardware and shims are not included, reuse existing components or source appropriate replacements. Confirm the starter rotation is clockwise to match your vehicle’s engine requirements. Proper alignment of the starter gear with the flywheel teeth is critical to avoid premature wear.

Quality Assurance and Warranty

The Bosch Starter (Remanufactured) SR0421X is remanufactured to meet OE recommendations, ensuring reliable performance and fitment. Bosch’s remanufacturing process includes comprehensive testing to verify electrical and mechanical functionality. While specific warranty details may vary, Bosch typically offers limited warranties on remanufactured starters to cover defects in materials and workmanship.