Left Piston – 6420301517 | Mercedes Sprinter OM642 Diesel Engine Standard Size Piston

SKU: 6420301517 - qty 1

Restore proper engine compression and performance in your Mercedes Sprinter with this Left Piston – part #6420301517. Specifically designed for the left cylinder bank of the OM642 3.0 L V6 diesel engine, this standard size (83.00 mm) piston is a precise fit for engines with stock bore diameters. Pistons are a critical internal engine component that help create combustion pressure, transfer force to the crankshaft, and maintain efficient engine operation. A worn, scored, or damaged piston can lead to poor compression, oil consumption, and reduced power — making this piston ideal for engine rebuilds, top-end servicing, or performance restoration projects. 

✔ OEM-Equivalent Standard-Size Piston

This piston meets the specifications of OEM part 6420301517 and fits the left bank of the OM642 engine, ensuring accurate combustion chamber sealing and smooth operation. 

✔ Designed for Diesel Engine Durability

Built to withstand the high pressures and temperatures of a diesel combustion environment, this piston supports reliable operation under load — whether you’re hauling cargo or cruising on the highway. 

✔ Ideal for Rebuilds & Repairs

• Perfect when performing a piston replacement, cylinder honing, or full top-end rebuild.

• Sold each — typically engines require multiple pistons when rebuilding (one per cylinder).

• Works with corresponding piston rings, wrist pins, and clips for a complete installation set (sold separately). 

📌 Fitment Tip: Always verify the piston size (standard vs oversize) and cross-reference with your engine’s specifications or VIN before purchasing to ensure correct fit.