MPA Electrical 12446 Starter Motor

Starter for Porsche 911, Boxster, Cayman

MPA Electrical Part Number 12446 is a remanufactured 12-volt starter built with a permanent magnet gear reduction design and a 1.7 kW rating. It is a Bosch-manufactured unit with clockwise rotation and a 9-tooth drive, made for select Porsche applications including Porsche 911, Boxster, Cayman, and Carrera GT fitments.

Key Features

• Remanufactured starter from MPA Electrical
• Permanent magnet gear reduction design for compact starting performance
• 1.7 kW output
• 12-volt electrical system
• Clockwise rotation
• 9-tooth drive
• Bosch manufacturer specification
• Part Number 12446

Product Details

This starter is built for Porsche starting-system service where the original unit matches the listed Bosch specification. It cross-references Bosch 0-001-123-001 for the same application. Use Part Number 12446 when replacing a worn or failed starter on a Porsche 911, Porsche Boxster, Porsche Cayman, or Porsche Carrera GT with the listed configuration.

Compatible With: Fits 1999-2008 Porsche 911, N/A; Fits 2006-2008 Porsche Boxster, N/A; Fits 2006-2008 Porsche Cayman, N/A; Fits 2004-2005 Porsche Carrera GT, N/A; Fits 1999 Porsche Boxster, N/A w/ Tiptronic trans., Optional; Remanufactured.

Common Issues This Starter Can Address

• Engine cranking slowly or inconsistently
• No-crank condition when the ignition is turned
• Starter motor failure from worn internal components
• Intermittent starting on Porsche 911, Boxster, or Cayman applications
• Starting-system replacement during electrical diagnosis

Installation Notes and Tips

Verify the vehicle’s original starter matches the 12-volt, clockwise, 9-tooth, 1.7 kW Bosch specification before installation. Confirm fitment by model year and transmission configuration, especially for the 1999 Porsche Boxster with Tiptronic transmission noted as optional. Compare the existing unit to Part Number 12446 and the OE-style cross-reference before replacing.

Quality Assurance

MPA Electrical remanufactured components are rebuilt to meet application-specific starter requirements for listed Porsche fitments. This unit is identified by Part Number 12446 and is intended for direct replacement use where the original Bosch starter specification matches.