Yanmar 3TNV & 4TNV Common-Rail CP4.1 High-Pressure Fuel Pump | Bosch 0445020538 New
This is a new, genuine Bosch CP4.1 high-pressure common-rail fuel pump, Bosch 0445020538. It fits Yanmar TNV common-rail engines: the 3TNV86CT, 3TNV88C, 4TNV86CT, 4TNV88C, 4TNV98C and 4TNV98CT. It replaces the earlier Bosch 0445020509 and matches Yanmar 129C28-51000 (earlier 129A00-51000). John Deere (MIA885077, MIA881999), Bobcat (7029317) and Thermo King (10-0565) list it under their own numbers.
The CP4.1 has one pumping piston and is lubricated only by fuel. Water, air in the fuel and dirty fuel are the main enemies of any CP4. Hard starting, low rail pressure codes and loss of power are common signs of a worn pump. If the old pump made metal, clean or replace the rail, lines and injectors before the new pump goes in.
Confirm Fitment Before You Order
This pump is listed only for TNV engines with a C in the model (for example 4TNV98C or 3TNV86CT). A pump marked Bosch 0445020509 or Yanmar 129A00-51000 is the older number this one replaces. Send us the engine model and serial number from the Yanmar plate, or the machine make, model and serial. Call 530-668-0818 and we will confirm the exact match at no charge before anything ships.
Specifications
| Part number | 0445020538 |
| Brand | Bosch |
| Condition | New, genuine, in original packaging |
| Type | Bosch CP4.1 high-pressure common-rail pump (one pumping piston) |
| Bosch type family | CP4N1 |
| Engines | Yanmar 3TNV86CT, 3TNV88C, 4TNV86CT, 4TNV88C, 4TNV98C, 4TNV98CT |
| Replaces | Bosch 0445020509 |
| Yanmar number | 129C28-51000 (earlier 129A00-51000) |
| Lubrication | Fuel-lubricated |
| Price | $1,412.00 |
| Shipping weight | 9 lb |
Fits / Applications
- Yanmar 3TNV86CT
- Yanmar 3TNV88C
- Yanmar 4TNV86CT
- Yanmar 4TNV88C
- Yanmar 4TNV98C
- Yanmar 4TNV98CT
- John Deere, Bobcat and Thermo King equipment with these Yanmar common-rail engines (OE numbers MIA885077 / MIA881999, 7029317, 10-0565)
The CP4.1 is lubricated only by diesel fuel. Find the cause of the old pump failure first. If the old pump made metal, clean or replace the rail, lines and injectors. Fit new fuel filters, drain the water separator, fix any suction-side air leaks and prime the system per the Yanmar or equipment procedure. Compare the connectors and sensors on your old pump with the new one before you install it.
Part Numbers & Cross Reference
Bosch (superseded) 0445020509 · Yanmar 129C28-51000 · Yanmar (earlier) 129A00-51000 · John Deere MIA885077 · John Deere MIA881999 · Bobcat 7029317 · Thermo King 10-0565
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.
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.
Ships UPS Ground anywhere in the lower 48. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax is 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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