Oil Pump Refurbishment BMW 1.8 N43B18 2.0 N43B20 N43

The oil pump refurbishment service is dedicated to BMW N43B18 (1.8L) and N43B20 (2.0L) petrol engines – four-cylinder inline units with direct injection, used in many BMW models from the late 2000s and early 2010s. The service applies to pumps with balance shafts (OEM: 11417559947, 11415A19409), which feature different mounting than version 11417567028. The balance shafts themselves are not refurbished – only visually inspected.

Technological process
Refurbishment involves a comprehensive reworking of the pump’s internal surfaces and precise rotor grinding. This restores proper working clearances and eliminates operational wear, restoring full lubrication system functionality.

Material and workmanship
Each pump undergoes thorough inspection, then regeneration using precision CNC tools. Working elements are machined without altering the original pump structure. Worn auxiliary components are replaced if needed.

User benefits

• Full technical efficiency with the original part retained

• Significant savings compared to a new pump

• No need to replace the entire module with balance shafts

• Fast turnaround time

• Extended engine lifespan

Compatibility and application
N43B18 and N43B20 engines were used in the following BMW models:

• BMW 1 Series (E81, E82, E87, E88)

• BMW 3 Series (E90, E91, E92)

• BMW 5 Series (E60, E61)

• BMW X1 Series (E84)
  Fits pumps OEM: 11417559947, 11415A19409 (with balance shafts)
  Not compatible with: 11417567028 (different mounting)

Why choose this solution?
Refurbishing the oil pump is an effective way to restore its full functionality without the cost of a new component. It’s both economical and eco-friendly – retaining the original part and avoiding secondary damage caused by lubrication failure.