No Products in the Cart
Cummins 3949619 is the Bosch type electronic common rail injector with a black two hole hold down flange, a top two stud terminal and a slim nozzle. It is used on Cummins ISBe 6.7 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Bosch 0445120018.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Common Rail Fuel Injector |
| Replaces | Bosch 0445120018 |
| Injector type | Electronic common rail |
| Engine | Cummins ISBe 6.7 |
| Cross references | Cummins 3949619 |
| Fits | the Cummins ISBe 6.7 diesel engine |
| Condition | New, aftermarket |
| Stat. HS-Code | 840999 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Bosch Part No.(SPM Part No.) | Fits |
|---|---|
| 0445120018 / Cummins 3949619(SPM-HEP-4880) | the Cummins ISBe 6.7 diesel engine |
| Brand | Part No. |
|---|---|
| Bosch | 0445120018 |
| Cummins | 3949619 (this page, SPM-HEP-4880) |
All of these numbers are the same part.
What it does
A common rail injector opens electrically several times per combustion stroke, spraying fuel at very high pressure. Its timing and flow are set by the engine controller using the trim code on its body.
Where it is used
Made for the Cummins ISBe 6.7 diesel engine.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (5 aftermarket sellers) | USD 99.00 to 130.21 | 1 Nov 2026 |
| SINOCMP | USD 129.00 | 1 Nov 2026 |
| MyMROmarts | USD 151.80 | 1 Nov 2026 |
| KuduParts | USD 151.90 | 1 Nov 2026 |
| Buy Machinery | USD 156.90 | 1 Nov 2026 |
| WDPart | USD 164.00 | 1 Nov 2026 |
| Fab Heavy | USD 196.00 | 1 Nov 2026 |
| Spare Part Mart | USD 81.58 | Today |
Our price of USD 81.58 is 18% to 58% 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 was made for the Cummins ISBe 6.7 diesel engine. Check the old fuel injector is marked 3949619 or one of the cross references, because makers change parts between serial ranges.
On the Cummins ISBe 6.7 diesel engine, 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.
Not always. If the others pass a return leak or balance test, one can be changed. Where they are all high hours, a full set keeps the cylinders even.
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 Cummins 3949619. 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.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
