BD Diesel Injection Pump Stock Exchange CP3 - Dodge 2003-2007 5.9L
When the CP3 on a 2003 to 2007 Dodge Ram 2500 or 3500 with the 5.9L common rail Cummins wears out, the truck tells you with long cranks, a sudden loss of power and low rail pressure faults. BD Diesel's 1050105 is a stock-output replacement CP3, rebuilt and bench tested by BD's injection department. It is the pump to buy when you want the truck back to factory performance, not a bigger pump that needs tuning to use.
The CP3 is the high pressure pump. It takes low pressure fuel from the lift pump and drives it into the fuel rail, where the injectors draw from it. The engine computer controls how much fuel the CP3 lets in through the fuel control actuator on the pump, and reads rail pressure from the sensor on the rail. Unlike the VP44 on the 1998.5-2002 trucks, the CP3 does not meter or time the fuel itself, the injectors do. That is why a weak CP3 shows up as low rail pressure: the pump cannot keep up with what the computer is asking for, especially under load.
A CP3 is often blamed for problems that start somewhere else. Before replacing it, check supply pressure from the lift pump at the CP3 inlet with a gauge; a starving CP3 acts like a bad one. Look at actual versus desired rail pressure with a scan tool, and rule out a leaking pressure relief valve, injector return flow and a sticking fuel control actuator. If the truck is also slipping or flaring between gears, read our 48RE Cummins transmission problems guide; a slipping 48RE or a converter that will not lock can feel like a loss of fuel.
BD lists this pump for 2003-2007 Dodge Ram trucks with the 5.9L common rail Cummins. That covers the full 5.9 common rail run, from the first 2003 trucks through the last 5.9 trucks of the 2007 model year. It does not fit the 1998.5-2002 trucks, which use the VP44, or the 2007.5 and newer 6.7L trucks. If your truck has a mid-2007 build date, confirm which engine you have on the VIN or the engine tag, or send us the year and VIN and we will check. Shop related parts on our 48RE parts page and in the engine and fuel parts category.
BD backs this pump with a 12 month, 24,000 mile parts and labor warranty, and states it is legal for use in all 50 states with no California EO needed.
| Brand | BD Diesel |
| Part number | 1050105 |
| Fits | BD Diesel Injection Pump Stock Exchange CP3 - Dodge 2003-2007 5.9L |
| Vehicle fitment | Dodge 2003-2007 (2003-2007) |
| Type | Injection Pumps & Controllers |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. The 1998.5-2002 5.9 trucks use the VP44 injection pump. This BD CP3 is for the 2003-2007 5.9L common rail Cummins only.
No. It is a stock exchange pump built to factory output, so it works with a stock tune. If you want more fuel for big injectors, a stroker CP3 is the better choice and usually needs tuning.
It is an exchange unit, so plan to keep your old CP3 intact. Contact us with your order number before shipping anything and we will tell you how the core is handled.
Test it first. If supply pressure at the CP3 drops under load, fix it before installing the new pump, because low supply pressure wears out a CP3.
BD lists a 12 month, 24,000 mile warranty on parts and labor for this pump.
BD states this pump does not need a California EO and is legal for sale and use in all 50 states, because it is a replacement part.
