Ignitions and Electrical› Charging Systems

REMY

IMPORT ALTERNATOR

$492.98

SKU: R06B 12931

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The REMY 12931 is an alternator that interchanges with Valeo 439601 and BMW OEM part numbers 12317561003 and 12317561004. It is designed to consistently charge the battery and power the electrical system. It features a lightweight design, high efficiency, and durability. Damage-checked for heat warping, corrosion, and improper surface alignment, it offers full compatibility with sensitive electronics systems and is designed for minimal installation and wiring hookup requirements. Rotor slip rings provide reliable functionality, while bearings are validated to OE standards and loaded with premium OE-standard lubricants.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandREMY
Part NumberR06B 12931

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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