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SPM-HEP-4241 is the 24 volt starter motor with 10 tooth pinion, solenoid and harness plug. It is used on Caterpillar C6.6 and C7.1 engines. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
It replaces Caterpillar 354-5671 and Denso 428000-9121.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Starter Motor |
| Replaces | Caterpillar 354-5671 |
| Voltage | 24 V |
| Rated power | 6.0 kW |
| Pinion | 10 teeth |
| Cross references | Denso 428000-9121 |
| Fits | Caterpillar C6.6 and C7.1 engines, including CAT 320D, 324E and 329E excavators and 924K, 930K, 938H and 938K loaders |
| Condition | New, aftermarket |
| Stat. HS-Code | 851140 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 354-5671(SPM-HEP-4241) | Caterpillar C6.6 and C7.1 engines, including CAT 320D, 324E and 329E excavators and 924K, 930K, 938H and 938K loaders |
| Brand | Part No. |
|---|---|
| Caterpillar | 354-5671 |
| Denso | 428000-9121 |
All of these numbers are the same part.
Slow or no cranking
With good batteries and cables, a starter that turns slowly or only clicks is worn.
Grinding on engagement
Worn pinion or flywheel teeth grind on start. Check the ring gear when fitting a new starter.
Intermittent starting
Worn brushes and solenoid contacts make starting hit and miss.
Fleet spares
A spare starter keeps a machine working while the old one is rebuilt or scrapped.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 376.95 | 25 Oct 2026 |
| eBay (2 aftermarket sellers) | USD 579.02 to 1,246.66 | 25 Oct 2026 |
| Spare Part Mart | USD 301.56 | Today |
Our price of USD 301.56 is 20% to 76% 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.
No. It is an aftermarket part made to fit in place of Caterpillar 354-5671. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar C6.6 and C7.1 engines, including CAT 320D, 324E and 329E excavators and 924K, 930K, 938H and 938K loaders. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
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