Bosch records indicate that this fuel injection pump, PES6KL70A120R18Z, is the newest number and supercedes the following alphanumeric pump numbers:

• PES6KL70A120R18Y
• PES6KL70A120R18

This means that it is possible for an M 129 engine to have a pump ending in 18Z, 18Y, or 18 fitted to it. Please check your core's identification tag for the exact alphanumeric number prior to contacting us.