Alternator Rebuild Kit 180A BMW 230 330 430 w/Denso 104211-0590, 104211-0591 - 21078RK-A

Need to rebuild your vehicle's alternator? This premium rebuild component kit is engineered to meet or exceed original factory specs, ensuring a perfect fit and long-lasting charging performance.

Note: Fits models equipped with 180 Amp alternators.

🚘 Vehicle Application Details

• BMW 230i (2017-2021 L4 2.0L 180A),
• BMW 230i xDrive (2017-2021 L4 2.0L 180A),
• BMW 330i (2017-2018 L4 2.0L 180A),
• BMW 330i GT xDrive (2017-2019 L4 2.0L 180A),
• BMW 330i xDrive (2017-2018 L4 2.0L 180A),
• BMW 430i (2017-2020 L4 2.0L 180A),
• BMW 430i Gran Coupe (2017-2020 L4 2.0L 180A),
• BMW 430i xDrive (2017-2020 L4 2.0L 180A),
• BMW 430i xDrive Gran Coupe (2017-2020 L4 2.0L 180A)

🔍 Cross-Reference Alternator Assemblies (Fits These Units)

• BMW OE: 12-31-8-645-325, 12-31-8-648-045, 8645325, 8645325-01, 8648045
• Denso OE: 104211-0590, 104211-0591 (180 Amp)
• Lester / PIC References: Lester 21078

🔧 Component-Specific Technical Data

⚡ Voltage Regulator Specs

• Technical Specifications: 12 Volt, B-Circuit, LIN Terminals, 14.3 Vset
• Design: For Denso Units on BMW & Mini
• Replaces OEM: Denso 126600-7740, 1FX 7740, 7740
• Aftermarket Crossovers: IN7740, 80904618, 80904632, 216-129, GNR-N305, W085-411

⚡ Brush Holder Assembly Specs

• Features: Includes Brushes
• Replaces OEM: Denso 021620-3030
• Interchange Numbers: 39-8206

⚡ Drive End Bearing (Front) Specs

• Industry Number: 55222
• Dimensions: 17mm ID x 52mm OD x 16mm W
• Interchange Numbers: Denso 949100-3330, 949100-4370, 949100-5010 | 10-3042-4W

⚡ Rotor SRE Bearing (Rear) Specs

• Industry Number: 53514 / 279
• Dimensions: 15mm ID x 35mm OD x 13mm W
• Interchange Numbers: Denso 949100-2790, 949100-3980, 949100-4440 | 10-2021-4W

⚡ Slip Ring Specs

• Design: For Hairpin Denso Alternators
• Dimensions: 5.8mm ID x 14.3mm OD x 11mm L
• Interchange Numbers: 28-82854

💕 Our Worry-Free Promise

Because automotive electrical parts are highly specific, we want you to buy with total confidence. If you tear down your alternator and realize you need a different size or configuration, don't sweat it. We offer easy, no-hassle returns and fast refunds. We are here to help your DIY build succeed!