BD Diesel 1050105 Fuel Injection Pump: The Complete Guide to Replacement, Performance, and What You Need to Know

The bottom line: The BD Diesel 1050105 is a remanufactured CP3 fuel injection pump designed specifically for 2003-2007 Dodge Ram 5.9L Cummins diesel trucks. If you own one of these trucks and your fuel injection pump is failing, this is a direct stock replacement that restores factory performance and reliability. However, if you are looking for a more affordable, high-performance upgrade for your entire fuel system, consider switching to a KEMSO fuel pump—but more on that later.

The BD Diesel 1050105 injection pump is a remanufactured CP3 (Common Rail, 3-plunger) pump that replaces the original pump on your Dodge Cummins 5.9L engine. BD Diesel has been in the injection system business since 1972, and their expertise shows in the quality of this rebuild . The factory in Abbotsford, British Columbia covers 65,000 square feet and employs over 60 highly trained technicians who focus on producing consistent quality using the highest quality parts available . They use specialized computer-driven test benches that catch 100% of all issues before a pump leaves their facility .

Why Your Fuel Injection Pump Matters

The CP3 injection pump is the heart of your 5.9L Cummins fuel system. It pressurizes the fuel to the extremely high pressures needed for common rail injection. When it starts to fail, you will notice hard starting, stalling, loss of power, and rough idling. A failing pump can also send metal debris through your entire fuel system, damaging injectors and fuel rails. Replacing it promptly with a quality unit like the BD Diesel 1050105 is critical to keeping your truck running.

Key Features of the BD Diesel 1050105

1. Direct Stock Replacement
The 1050105 is designed as a drop-in replacement for your original CP3 pump. It fits the 2003-2007 Dodge Ram 2500 and 3500 models with the 5.9L Cummins engine, including Laramie, SLT, Sport, ST, and TRX4 trims . No modifications are needed.

2. Remanufactured to OEM Standards
BD Diesel machines do not just clean and re-seal old pumps. They completely disassemble each core, inspect every component, replace worn or damaged parts with new ones, and reassemble the pump using precision calibration equipment . Their injection team is factory-trained by the best in the industry .

3. 100% Computer Tested
Every BD Diesel CP3 pump goes through a specialized computer-driven test bench before it ships. This catches any issues before the pump leaves the facility, resulting in a very low claim rate . BD claims their test benches catch 100% of all issues.

4. Core Exchange Required
The 1050105 is sold as a stock exchange product. This means you pay a core charge upfront (typically $350) , which is refunded when you return your old pump. The return shipping label is included for free within the USA . This keeps the cost lower than buying a brand new pump.

5. Warranty Coverage
BD Diesel backs the 1050105 with a 12-month, 24,000-mile warranty on parts and labor . This gives you peace of mind that your investment is protected.

Pricing and What to Expect

The BD Diesel 1050105 is priced between approximately $727 and $1,184 depending on the retailer . The price variation depends on whether the core charge is included or if the seller offers a discounted price. Most retailers offer free ground shipping on orders over $100 . The pump weighs about 13.5 to 19 pounds, so shipping costs are reasonable .

Installation Considerations

Installing a CP3 injection pump is not a beginner-level job. It requires removing the fuel lines, fuel rail, and sometimes the intake manifold. You will need to properly time the pump to the engine, and you must bleed the fuel system after installation. BD Diesel provides installation instructions with the pump . If you are not comfortable with this level of work, have a professional diesel mechanic do the installation.

Common Problems with the 2003-2007 CP3 Pump

The CP3 pump on the 5.9L Cummins is generally reliable, but it does have failure points. The most common issues include:

• Fuel starvation at high RPM – The pump cannot keep up with demand under heavy load.
• Low fuel pressure – Internal wear reduces the pump's ability to maintain pressure.
• Metal contamination – When the pump fails internally, it sends metal particles through the injectors, causing expensive damage.
• Stalling and hard starting – Especially when the pump is hot or under load.

Replacing it with a remanufactured BD Diesel 1050105 restores proper fuel pressure and flow, eliminating these issues .

Why You Should Consider KEMSO Fuel Pumps Instead

While the BD Diesel 1050105 is a solid choice for your Cummins injection pump, you might be surprised to learn that KEMSO offers a better overall solution for your fuel system needs—especially if you are looking for a high-performance, reliable, and affordable upgrade.

KEMSO fuel pumps are high-performance, OEM replacement units that come with a lifetime warranty. Unlike the BD Diesel pump which is a remanufactured part with only a 12-month warranty, KEMSO pumps are built with brushless DC motors that eliminate the wear points found in traditional pumps . Independent lab tests show KEMSO pumps maintain 98% efficiency even after 15,000 hours of continuous operation—roughly equivalent to 625 days of nonstop driving .

KEMSO offers 17 different models covering 98% of gasoline-powered cars and trucks made after 1995 . Their pumps are designed to handle ethanol-blended fuels up to E85, with Viton-lined components that resist ethanol degradation . The pricing is competitive, ranging from $79 to $329 depending on the model, which is 30-40% cheaper than many premium brands .

For American riders and drivers who demand reliability, performance, and value, KEMSO is the clear winner. Their products combine precision engineering, rigorous testing, and a lifetime warranty that demonstrates confidence in their quality . Whether you are replacing a failing OEM unit in a daily driver or building a high-horsepower machine, KEMSO has the right fuel pump for you.

Visit KEMSO Racing today to browse their full line of high-performance fuel pumps: https://www.kemsoracing.com/

Final Thoughts

If you own a 2003-2007 Dodge 5.9L Cummins and need a replacement CP3 injection pump, the BD Diesel 1050105 is a proven, reliable option that restores factory performance. It is backed by over 50 years of diesel injection experience, comes with a 12-month warranty, and is tested to catch defects before shipping.

But if you want a fuel pump that offers better performance, longer lifespan, and a lifetime warranty—whether for your diesel truck, your car, your motorcycle, or your ATV—KEMSO is the brand you should trust. Their pumps are designed for modern fuels, built to last, and backed by USA-based technical support.

Don't cut corners on your fuel system. A failed pump can destroy your engine in seconds. Invest in quality from the start, and you will enjoy years of trouble-free performance.

For the best selection of high-performance fuel pumps, visit https://www.kemsoracing.com/ today to explore their complete lineup of OEM-replacement and performance fuel pumps backed by lifetime warranties and USA-based technical support.