Alternator – 6421540402 (180 Amp) | Mercedes Sprinter High-Output OEM-Style Charging System

SKU: 6421540402 - qty 1

Replace a weak or failing alternator with this Alternator – part #6421540402 (made by Valeo), a 180 amp high-output OEM-style alternator designed for Mercedes Sprinter vans and other Mercedes applications with the 3.0 L OM642 V6 diesel engine. This alternator helps keep your battery charged and electrical systems running strong, even under heavy electrical loads from accessories, lighting, HVAC, and onboard electronics. A healthy alternator prevents battery drain, dim headlights, rough starting, and dashboard warning lights, so installing a proper replacement is key to reliable everyday use and long-term vehicle health. 

✔ High-Output 180 Amp Charging

• Delivers 180 amps of charging output — ideal for Sprinters that require robust alternator performance. 

• Includes the matching serpentine/7-groove pulley for direct fitment and correct belt engagement. 

✔ OEM-Style Fit & Function

• Matches Mercedes-Benz part 6421540402 / A6421540402 for correct electrical output and mounting specifications on OM642 diesel engines. 

• Produces consistent voltage and current to support all vehicle electronics while keeping the battery charged and healthy.

✔ Durable & Reliable Design

• Built to withstand the heat, vibration, and continuous loads typical of Sprinter service life — perfect for daily drivers and work vans.

• Essential upgrade or replacement when diagnosing slow cranking, poor battery life, or electrical system faults.

📌 Fitment Tip: This alternator is commonly used on 2007–2022 Sprinter 2500/3500 models with the OM642 diesel engine. Always verify fitment with your vehicle’s VIN and original part number before ordering.