Caterpillar C9.3 Fuel Injector

OE 3043637 / 4563509 / 20R5075

Aftermarket replacement for B2B importers, distributors, wholesalers and private-label programs.

Product category: Fuel Injectors
Brand application: Caterpillar
OE references: 3043637 / 4563509 / 20R5075
Application: Caterpillar C9.3

Confirm final specification and application before ordering.

PRODUCT OVERVIEW

ABOUT THIS FUEL INJECTOR.

The TRUPA Caterpillar C9.3 Fuel Injector is an aftermarket replacement fuel injector referenced to OE numbers 3043637, 4563509, 20R5075. It is listed for Caterpillar C9.3. TRUPA supplies it to importers, distributors, wholesalers and private-label programs, with China export supply and partner-warehouse support in the USA and Brazil for eligible orders.

WHAT IT DOES

The fuel injector delivers precisely metered, atomised diesel into the combustion chamber. Heavy-duty engines use mechanical (PT), unit injector (EUI/HEUI) or common-rail designs, each with tight tolerances.

APPLICATION & FITMENT

Listed for Caterpillar C9.3. More parts for Caterpillar. Engine family: Caterpillar C7 / C9.

OE & INTERCHANGE NUMBERS

3043637
4563509
20R5075

BEFORE YOU ORDER

OE or Bosch reference number and engine model
Injector type (PT, EUI, HEUI or common rail)
Trim or calibration code requirements for electronic injectors
Production year, as injectors are often superseded within an engine family

COMMON REPLACEMENT SIGNS

Hard starting, misfire or rough idle
Black or white smoke and higher fuel consumption
Loss of power or cylinder imbalance
Fuel dilution of the engine oil

Read the troubleshooting guide →

QUALITY CHECKS

Injectors should be bench-tested for flow, spray pattern and leakage against the engine specification before shipment. How TRUPA approaches quality control.

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