Vehicle Compatibility

• Equipment Brand: Caterpillar (CAT)

• Part Type: Diesel Fuel Injector

• OE Reference Number: 454-5091

• Alternative Number Formats: 4545091, CA4545091

• Engine Model: C7.1

• Equipment Type: Hydraulic Excavator, Track Skidder

Compatible Caterpillar Equipment Models

• Excavators: 320D2, 320D2 L, 320D2 GC, 323D3

• Track Skidder: 527

Compatibility Notes

• Caterpillar's official parts catalog lists 454-5091 for the 323D3, 320D2 GC, 320D2, 324 and 320D2 L excavators, as well as the 527 track skidder. <Cite refs={["turn350918search0"]}/>

• The C7.1 engine association is also listed by aftermarket parts references. <Cite refs={["turn350918search5","turn350918search11"]}/>

• Compatibility depends on machine configuration and serial number.

• Verify the original injector part number and engine identification before ordering.

• Do not assume compatibility with other excavator models based on engine family alone.

FAQ

Q1: Which engine uses fuel injector 454-5091?

The injector is listed for selected Caterpillar C7.1 engine applications.

Q2: Which excavator models are compatible with 454-5091?

Listed models include 320D2, 320D2 L, 320D2 GC and 323D3. The Caterpillar catalog also lists model 324.

Q3: Is injector 454-5091 compatible with the CAT 527 skidder?

Yes, the Caterpillar parts catalog lists the 527 track skidder as a compatible application.

Q4: What alternative part number formats are used?

The reference may also appear as 4545091 or CA4545091 in aftermarket listings.

Q5: How can I confirm compatibility?

Compare the original injector number with 454-5091 and verify the engine model and machine serial number against the applicable Caterpillar parts catalog.