Bosch AL4246N Alternator
OE Quality 60-Day Returns
Bosch
 Alternator (New)

Bosch AL4246N Alternator

Brand Bosch AL4246N
Voltage 12
Plug Clock Rear View Main Mounting Ear at 6 O Clock 11
Fan Type Internal
Ground Type Negative
Mounting Configuration Code Short
Rotation Direction Clockwise (right)
One Wire Capable No
Pulley Included Yes
External Regulator Included Yes
Pulley Groove Quantity 6
Case Color Silver
Outside Pulley Diameter 51
Regulator Type Internal
Decoupled Or Clutch Pulley No
AC Service Tap No
Case Material Aluminum
Amperage Rating 100
Mounting Type Single pivoted lever
Brushless No
Automotive Item Weight (lbs) 11.6845 lb
New Or Remanufactured New
Product Length 6.338583 in
Pulley Type / Belt Type (Alternator) 6s
Product line Alternator (New)
Fits Mazda · 43 vehicles

New replacement unit. Built as a 12-volt alternator for charging-system service.

Internal regulation. Includes an internal regulator and internal fan for controlled output.

OE-style fitment. Uses a 6-groove pulley and short mounting configuration.

Cross-references 27060WB002, P31H18300B and P51X18300B for the same application. See all 5.

$284.53Free shipping
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Overview

Bosch AL4246N is a new 12-volt alternator built for charging-system replacement on select Mazda applications. It uses an internal regulator, internal fan, and a 100-amp output to support stable electrical performance.

  • New alternator for charging-system service
  • 12-volt design with 100-amp amperage rating
  • Internal regulator and internal fan
  • Aluminum case with silver finish
  • 6-groove pulley included

Fitment

Compatible with Mazda CX-5, Mazda MX-5 Miata, Mazda 6, Mazda CX-3, Mazda 3, and Mazda 3 Sport applications listed below.

  • Fits 2022-2025 Mazda CX-5, N/A
  • Fits 2013-2020 Mazda CX-5, N/A
  • Fits 2016-2022 Mazda MX-5 Miata, N/A
  • Fits 2014-2021 Mazda 6, N/A
  • Fits 2016-2021 Mazda CX-3, N/A
  • Fits 2014-2018 Mazda 3, N/A
  • Fits 2014-2018 Mazda 3 Sport, N/A

Product Details

The Bosch AL4246N alternator is engineered as a new replacement unit for vehicles that need dependable charging output and consistent voltage control. Its short mounting configuration, clockwise rotation, negative ground setup, and single pivoted lever mounting type are important fitment details for Mazda CX-5, Mazda MX-5 Miata, Mazda 6, Mazda CX-3, Mazda 3, and Mazda 3 Sport applications. Bosch AL4246N also includes a pulley and uses a 6S pulley/belt type with six grooves.

This part cross-references Bosch and OE-style applications such as 27060WB002 and PE0118300 for the same application.

Common Replacement Reasons

  • Battery warning light or charging-system fault
  • Low charging output at idle or under load
  • Electrical accessories operating inconsistently
  • Noise or wear from the alternator assembly
  • Replacement of a failed original charging unit

Installation Notes

Verify the mounting configuration, plug orientation, pulley type, and rotation direction before installation. Confirm the vehicle uses the listed 12-volt, negative-ground charging setup and match the application notes for the correct Mazda fitment. Professional installation and system testing after replacement are recommended.

Quality Assurance

Bosch Premium Alternators are designed, built, and tested for performance and reliability. This new alternator, part number AL4246N, reflects Bosch charging-system engineering for service replacement applications.

Related reading

This part fits 43 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelTransmissionLitersCylindersNotes
2025MazdaCX-5—2.5LL4Alternator (New)
2024MazdaCX-5—2.5LL4Alternator (New)
2023MazdaCX-5—2.5LL4Alternator (New)
2022MazdaCX-5—2.5LL4Alternator (New)
2022MazdaMX-5 MiataAutomatic2.0LL4Alternator (New)
2021Mazda6—2.5LL4Alternator (New)
2021MazdaCX-3—2.0LL4Alternator (New)
2021MazdaMX-5 MiataAutomatic2.0LL4Alternator (New)
2020Mazda6—2.5LL4Alternator (New)
2020MazdaCX-3—2.0LL4Alternator (New)
2020MazdaCX-5—2.5LL4Alternator (New)
2020MazdaMX-5 MiataAutomatic2.0LL4Alternator (New)
2019Mazda6—2.5LL4Alternator (New)
2019MazdaCX-3—2.0LL4Alternator (New)
2019MazdaCX-5—2.5LL4Alternator (New)
2019MazdaMX-5 MiataAutomatic2.0LL4Alternator (New)
2018Mazda3—2.5LL4Alternator (New)
2018Mazda3 Sport—2.5LL4Alternator (New)
2018Mazda6—2.5LL4Alternator (New)
2018MazdaCX-3—2.0LL4Alternator (New)
2018MazdaCX-5—2.5LL4Alternator (New)
2018MazdaMX-5 Miata—2.0LL4Alternator (New)
2017Mazda3—2.5LL4Alternator (New)
2017Mazda3 Sport—2.5LL4Alternator (New)
2017Mazda6—2.5LL4Alternator (New)
2017MazdaCX-3—2.0LL4Alternator (New)
2017MazdaCX-5—2.5LL4Alternator (New)
2017MazdaMX-5 Miata—2.0LL4Alternator (New)
2016Mazda3—2.5LL4Alternator (New)
2016Mazda3 Sport—2.5LL4Alternator (New)
2016Mazda6—2.5LL4Alternator (New)
2016MazdaCX-3—2.0LL4Alternator (New)
2016MazdaCX-5—2.5LL4Alternator (New)
2016MazdaMX-5 Miata—2.0LL4Alternator (New)
2015Mazda3—2.5LL4Alternator (New)
2015Mazda3 Sport—2.5LL4Alternator (New)
2015Mazda6—2.5LL4Alternator (New)
2015MazdaCX-5—2.5LL4Alternator (New)
2014Mazda3—2.5LL4Alternator (New)
2014Mazda3 Sport—2.5LL4Alternator (New)
2014Mazda6—2.5LL4Alternator (New)
2014MazdaCX-5—2.5LL4Alternator (New)
2013MazdaCX-5—2.0LL4Alternator (New)
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
27060WB002P31H18300BP51X18300BP53N18300CPE0118300