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Piston for Mercedes-Benz M121 in 86.50 mm third repair size. For selected M121.920 / .921 / .923 engines.
OEM MB M121 / 121 030 72 17
121 030 72 17
zł4,800.00
Tax included
| Waiting time 3 weeks
Piston for Mercedes-Benz M121 in 86.50 mm third repair size. For selected M121.920 / .921 / .923 engines.
Mercedes-Benz 121 030 72 17 is a piston for Mercedes-Benz M121 engines in 86.50 mm size. It is a 3rd repair size piston used after proper cylinder machining in classic Mercedes M121-series engines.
Application / fitment
The piston is intended for selected Mercedes-Benz M121 engines requiring the 86.50 mm size. Before installation, confirm engine code, machined cylinder diameter, piston type, wrist pin, compression height and ring compatibility.
- Mercedes-Benz M121.920 — selected Ponton 190 / 190b
- Mercedes-Benz M121.921 / M121.928 — selected 190SL W121
- Mercedes-Benz M121.923 — selected Ponton 180a / 180b
- piston diameter: 86.50 mm
- third repair size / 3rd repair size
When installing a piston in a vintage engine, measure the cylinder, piston-to-wall clearance, ring grooves, wrist pin and piston weight relative to the other cylinders. This part should not be selected by car model alone without verifying engine code and machined bore size.
Technical information
- Part type: piston
- OE number: 121 030 72 17
- Engine: Mercedes-Benz M121
- Diameter: 86.50 mm
- Size: third repair size / 3rd repair size
- Overall length: approx. 105 mm
- Compression height: approx. 43 mm
- Wrist pin: 25 mm
- Pin length: approx. 72 mm
