Bosch 0445010320 High-Pressure Pump – Common Rail Heart For 2.3-Litre LCV Diesels

Every last-mile van, motorhome or light truck running a 2.3-litre common-rail diesel relies on one hidden component to keep loads moving and holidays stress-free: the high-pressure pump. The unit marked 0445010320 (Bosch 0 445 010 320) is a CP1H3/R70 common rail high-pressure fuel pump designed for popular European light commercial vehicles. dieselcatalog. 

You'll find this pump specified for:

Iveco Daily 2.3 D / 2.3 HPI

Fiat Ducato 2.3 JTD / Multijet

Peugeot Boxer & Citroën Jumper / Relay 2.3 HDi  

If your old pump tag reads 0445010320, 0 445 010 320, or OE numbers 5801386698 / 5801439062 / 1609098080, you're in the right place.

 

 

In a common-rail diesel, injectors are "dumb" – they open when commanded, but they rely on a separate pump to keep the rail charged with fuel at up to ~1600–2000 bar.  

The 0445010320 CP1 pump is responsible for:

Generating high and stable rail pressure so the ECU can deliver multiple injections per cycle

Feeding all injectors via a shared rail, instead of one pump per cylinder

Adjusting output electronically so pressure matches engine load, from gentle idling to full-load motorway climbs

When the original pump wears, you'll see symptoms such as hard starting, rail-pressure fault codes, loss of power or sudden limp mode. A fresh 0445010320 restores consistent pressure and brings the whole fuel system back into its design window.

 

 

This model is widely sold as a "common rail high pressure fuel injection pump 0445010320 for Iveco Daily / Fiat Ducato 2.3D", often listed together with alternative Bosch numbers 0445010319 and 0445010260. eBay Australia+1

Typical real-world uses include:

Parcel and courier fleets running Ducato / Boxer / Jumper panel vans

Iveco Daily chassis cabs and minibuses in city distribution

Motorhomes built on 2.3-litre Ducato or Iveco platforms

For these vehicles, a reliable CP1 pump means fewer call-outs, more on-time deliveries and less ruined holidays.

 

Manufacturers and distributors highlight several key points:

Bosch CP1H3/R70 pump architecture – proven first-generation common-rail design, still widely used due to its robustness. 

All-steel high-pressure section, with precision-ground plungers and hardened cam surfaces for long life under diesel lubrication.  

Weight around 5 kg, compact housing (~15 × 13 × 10 cm) that bolts directly to the original bracket and timing gear.  

Available as brand-new or professionally remanufactured; reman units are fully stripped, inspected and rebuilt with new wear parts, then calibrated on test benches, typically backed by a 6–12 month warranty.  

Short spec block you can place on your product page:

Type: Bosch CP1H3/R70 common-rail high-pressure pump
Part No.: 0445010320 / 0 445 010 320
OE refs: 5801386698, 5801439062, 1609098080 (Fiat / Iveco / Citroën)
Fuel: Diesel, common-rail (CR) systems

 

 

✔ Better combustion, less smoke
Stable high-pressure supply lets the ECU use finely split pilot and main injections, improving atomisation and reducing visible smoke on acceleration. 

✔ Improved fuel economy
When rail pressure tracks ECU targets accurately, injection duration stays short and precise, saving fuel on every stop-start cycle.

✔ Lower risk of sudden breakdowns
A failing pump can instantly drop rail pressure and shut the engine down. Replacing a noisy or high-hour unit prevents expensive roadside recovery.

✔ Drop-in convenience
The housing, ports and timing features mirror the OE pump, so installation on Ducato / Daily / Boxer engines is straightforward for any competent diesel workshop.

 

 

Confirm the ID tag – match 0445010320 / 0 445 010 320 or the OE number from the old pump.

Clean the system – new filter, flushed lines and clean fuel are essential for CP1 longevity. 

Lock timing – follow the engine manual to lock the crank and cam; transfer timing marks from the old pump if required.

Fit & bleed – mount the new pump, torque fasteners, connect lines, then bleed air from the low-pressure side.

Scan & road-test – clear fault codes, monitor rail pressure under load and confirm smooth starting and acceleration.

 

 

 

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