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SPM-HEP-5212 is the electronic unit injector: the grey body with the plunger spring, the white solenoid cap with the terminal pins and the nozzle with its sealing rings. It is used on Caterpillar 3406E engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
It replaces Caterpillar 103-4562 and Caterpillar 0R-4300.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Fuel Injector |
| Replaces | Caterpillar 103-4562 |
| Type | Electronic unit injector (EUI) |
| Engine | Caterpillar 3406E |
| Cross references | Caterpillar 0R-4300 |
| Fits | Caterpillar machines, trucks and gen sets with the 3406E engine |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 103-4562(SPM-HEP-5212) | Caterpillar machines, trucks and gen sets with the 3406E engine |
| 0R-4300(SPM-HEP-5212) | Caterpillar machines, trucks and gen sets with the 3406E engine |
What it does
It sprays a metered charge of fuel into the cylinder at the right moment. Spray pattern and opening pressure decide how cleanly the engine burns its fuel.
Where it is used
Made for the Caterpillar machines and trucks and gen sets with the 3406E engine. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (4 aftermarket sellers) | USD 350.90 to 399.99 | 3 Nov 2026 |
| SINOCMP | USD 479.00 | 3 Nov 2026 |
| Spare Part Mart | USD 280.72 | Today |
Our price of USD 280.72 is 20% to 41% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it is a direct replacement for the Caterpillar 103-4562 with the same fitting.
Often 5,000 to 10,000 hours, but much less on poor or wet fuel. Injectors are usually changed when they fail a test, not by hours.
Black or white smoke, a misfire or knock on one cylinder, hard starting, higher fuel use, or a high return leak or balance rate on test.
Clean the bore and seat of carbon, and keep the nozzle capped until it goes in. Torque the clamp to the engine manual, not by feel.
Run a return leak test or read the injector balance rates with a diagnostic tool. On older mechanical engines, cracking each pipe in turn at idle shows which cylinder changes least.
No. It is an aftermarket fuel injector made to replace the Caterpillar 103-4562. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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