Bosch
Starter (Remanufactured)

Bosch SR4242X Starter Motor

Brand Bosch SR4242X
Mounting Bolt Hole Quantity 2
Mounting Hardware Included No
Mounting Shims Included No
New Or Remanufactured Remanufactured
Nose Cone Material Aluminum
Nose Cone Type Closed Nose
Original Equipment Manufacturer Names BO
Power Rating 1
Solenoid Attached Yes
Starter Finish Aluminum
Starter Rotation Clockwise
Tooth Quantity 11
Voltage 12
Product line Starter (Remanufactured)
Fits Mazda · 4 vehicles

Remanufactured starter. Built and tested for dependable performance and reliability.

Aluminum nose cone. Lightweight construction with a closed-nose design.

Integrated solenoid. Simplifies installation with fewer separate components.

Cross-references PE0118400 for the same application. See all 1.

$222.70Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.
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Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $222.70
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Bosch SR4242X Remanufactured Starter

The Bosch SR4242X is a remanufactured 12-volt starter built for direct replacement in select Mazda applications. It is designed with a clockwise rotation, an attached solenoid, and an aluminum closed-nose housing for a precise OE-style fit.

Compatible with 2011 Mazda 3 Sport and 2012 Mazda 3 / Mazda 3 Sport applications listed below, this Bosch starter supports reliable engine cranking for daily driving and routine repair work. The SR4242X is a practical choice when you need a remanufactured starter for Mazda 3 starting-system service.

Key Features

  • 12-volt remanufactured starter for starting-system replacement
  • Clockwise starter rotation
  • Attached solenoid for streamlined installation
  • Aluminum nose cone with closed-nose design
  • 11-tooth drive gear
  • 2 mounting bolt holes
  • Bosch Premium Starters line, engineered and tested for performance and reliability

Detailed Description

Bosch SR4242X is a remanufactured starter from Bosch’s Premium Starters line, a product line focused on rebuilt electrical starting components that are designed, built, and tested for dependable operation. This unit uses a 1 power rating, aluminum finish, and a closed aluminum nose cone to match the original starter layout on the listed Mazda vehicles. The SR4242X part number is also useful for cross-reference searches when comparing starter replacements for Mazda 3 and Mazda 3 Sport starting-system repairs.

This part cross-references PE0118400 for the same application.

Common Uses

  • Restoring engine cranking on a Mazda 3 with a worn starter
  • Replacing a starter that clicks but does not engage
  • Addressing slow or intermittent starting on a Mazda 3 Sport
  • Correcting starter drive or solenoid-related starting failure
  • Replacing a remanufactured starter during electrical system repair

Installation Notes and Tips

Verify the vehicle build date before ordering: 2012 Mazda 3 and 2012 Mazda 3 Sport applications include a note for vehicles built to 04/2012. Confirm the starter rotation, tooth count, mounting bolt hole quantity, and solenoid configuration against the removed unit before installation. Mounting hardware and shims are not included, so reuse or source the required installation components as needed. The SR4242X is listed for N/A position applications.

Quality Assurance

Bosch Premium Starters are manufactured and tested to support consistent starting performance and reliability in remanufactured replacement applications. The Bosch SR4242X is a remanufactured starter built to meet the needs of the specified Mazda fitments.

This part fits 4 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2012Mazda32.0LL4N/ATo 04/2012; Starter (Remanufactured)
2012Mazda32.0LL4N/AStarter (Remanufactured)
2012Mazda3 Sport2.0LL4N/ATo 04/2012; Starter (Remanufactured)
2011Mazda3 Sport2.0LL4N/AStarter (Remanufactured)
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
PE0118400