Alternator Rebuild Kit Mercedes AMG GT 55, S63 AMG with 250 Amp CG25S048 - 21978OERK-A

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

🚘 Vehicle Application Details

• Alfa Romeo: Stelvio (2018-2024 V6 2.9L)
• Mercedes-Benz:
  AMG GT 55 (2024-2026 V8 4.0L),
  AMG GT 63 (2024-2026 V8 4.0L),
  AMG GT 63 Pro (2025-2026 V8 4.0L),
  E63 AMG S (2020-2021 V8 4.0L),
  G63 4x4 Squared AMG (2022-2024 V8 4.0L),
  G63 AMG (2019-2024 V8 4.0L),
  S63 AMG (2018-2021 V8 4.0L),
  SL55 AMG (2022-2026 V8 4.0L),
  SL63 AMG (2022-2026 V8 4.0L)

🔍 Cross-Reference Alternator Assemblies (Fits These Units)

• Alfa Romeo OE: 6840 7427AA, 68407427AA
• Mercedes-Benz OE: 000 906 12 07, 000-906-12-07, 000-906-12-07-80, A 000 906 12 07, 0009061207, 000906120780, A0009061207
• Valeo OE: CG25S048, 443309, 2712405B (12 Volt, 250 Amp, SC4 Pulley)
• Lester / PIC References: Lester 21978 | PIC 208-1262

🔧 Component-Specific Technical Data

⚡ Voltage Regulator with Brushes Specs

• Technical Specifications: 12 Volt, B-Circuit, LIN, 14.3 Vset
• Replaces OEM: Valeo 2619450, 599288

⚡ Drive End Bearing (Front) Specs

• Industry Number: 54700 / 6303-2RS
• Dimensions: 17mm ID x 47mm OD x 14mm W
• Interchange Numbers: Valeo 593563 | 6-303-4W

⚡ Rotor SRE Bearing (Rear) Specs

• Industry Number: 53500 / 6202DWS
• Dimensions: 15mm ID x 35mm OD x 11mm W
• Interchange Numbers: Valeo 593684 | 6-202-4W

⚡ Bearing Tolerance Ring / Cap Specs

• Dimensions: 35mm ID x 37.3mm OD x 19.3mm Overall Height
• Interchange Numbers: 46-94435

⚡ Slip Ring Specs

• Dimensions: 9mm ID x 14.9mm OD x 48.3mm L
• Replaces OEM: Valeo 2606286
• Interchange Numbers: 28-94867

💕 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!