Mercedes MBE900 OM904, OM906 & OM926 Electronic Unit Pump | Bosch 0986445103 Remanufactured (A0280746902)
This is the Bosch 0986445103, an electronic unit pump remanufactured by Bosch for the Mercedes-Benz MBE900 engine family: the OM904 LA four cylinder and the OM906 LA and OM926 LA six cylinders. Each cylinder has its own pump in the block, driven by the camshaft and feeding one injector through a short high-pressure line. It replaces Mercedes A0280746902 and Detroit Diesel RA0280746902, and the new Bosch version is 0414799008. This listing is for one pump, and a refundable core applies.
A single-cylinder miss, a cylinder cutout that points at one hole, fuel in the oil from worn pump seals or a solenoid fault code are the usual reasons a unit pump is changed. The MBE900 used more than one unit pump over its life. The other common one is Bosch 0986445021 (Mercedes A0280749102), and the two are not the same part.
Confirm Fitment Before You Order
MBE900 engines take either this pump (Mercedes A0280746902, Bosch 0414799008) or Bosch 0986445021 (Mercedes A0280749102, Bosch 0414799017), depending on the build. Send us the engine serial number and the Mercedes or Bosch number on your old pump. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | 0986445103 |
| Brand | Bosch |
| Condition | Remanufactured |
| Warranty | Bosch limited warranty on remanufactured units, parts only. Call us and we handle the claim. |
| Type | Bosch electronic unit pump (EUP), solenoid controlled, camshaft driven |
| Engines | Mercedes-Benz MBE900: OM904 LA, OM906 LA, OM926 LA |
| Pumps per engine | One per cylinder |
| Sold as | One pump |
| Mercedes number | A0280746902 |
| Detroit Diesel number | RA0280746902 |
| Remanufactured by | Bosch |
| Core charge | Refundable in full when we receive your rebuildable core |
| Shipping weight | 6 lb |
Fits / Applications
- Mercedes-Benz MBE900 OM904 LA four-cylinder engines that carry unit pump A0280746902
- Mercedes-Benz MBE900 OM906 LA and OM926 LA six-cylinder engines that carry unit pump A0280746902
- Detroit Diesel branded MBE900 engines where the pump is listed as RA0280746902
- One pump per cylinder. Check the number on the old pump before you order.
Fit new O-rings and oil them before the pump goes into the block, and torque the high-pressure line to the Mercedes figure. After a unit pump is changed, follow the Mercedes or Detroit service procedure for the engine controller, including the pump classification code where the controller asks for one.
Part Numbers & Cross Reference
Bosch 0986445103 · Bosch new version 0414799008 · Bosch 0414799027 · Bosch 0414799058 · Mercedes-Benz A0280746902 · Mercedes-Benz A0270749202 · Mercedes-Benz A0260747302 · Detroit Diesel RA0280746902
Cross-reference numbers can change with engine serial, build year and emissions tier, so treat this list as a starting point. Send us your engine serial number and we will confirm the exact match against your build before anything ships. That check is free and takes a few minutes.
Frequently Asked Questions
Which engines does the Bosch 0986445103 fit?
The Mercedes-Benz MBE900 family: OM904 LA, OM906 LA and OM926 LA engines whose original unit pump is Mercedes A0280746902, Detroit Diesel RA0280746902 or Bosch 0414799008.
Is the 0986445103 the same as the 0986445021?
No. Both are Bosch remanufactured unit pumps for the MBE900, but 0986445021 replaces Mercedes A0280749102 and Bosch 0414799017. Match the number on your old pump.
Is it new or remanufactured, and is there a core?
It is remanufactured by Bosch, and a refundable core applies. The new Bosch version is 0414799008.
How many pumps does my engine need?
One per cylinder: four on an OM904 and six on an OM906 or OM926. This listing is for one pump. Call 530-668-0818 with your engine serial number if you are not sure which pump you have.
Related Parts
- Detroit Diesel DD13 12.8L GHG17 Common-Rail Fuel Injector | Bosch 0986435741 Remanufactured
- Mack Diesel Engine Fuel Injector Nozzle & Holder Assembly (736GB421M2) | Bosch 0432191273 New
- Mechanical Diesel Injector Testing & Rebuild Service
Why Buy From Valley Fuel Injection
We are a diesel fuel-injection and turbocharger shop in Woodland, CA, rebuilding pumps, injectors and turbos on our own benches since 1993, not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial, VIN or build date before anything ships, so the right part arrives the first time.
UPS Ground anywhere in the lower 48. A refundable core deposit is added at checkout and refunded in full when we receive your rebuildable core. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax and the refundable core charge are additional; shipping is calculated at checkout. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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