Hard starts, rough idle, or a misfire under load often trace back to a worn injector on the 5.9 Cummins. The Bosch 0445120255 is a brand-new stock-spec fuel injector for 5.9 Cummins 2003-2004.

Bosch supplies OE diesel injection hardware for these platforms. This unit restores factory fuel delivery when you want a genuine Bosch replacement rather than a no-name rebuild.

What you get

• Bosch 0445120255 common-rail fuel injector
• Brand-new Bosch unit (not reman)
• Fitment: 5.9 Cummins 2003-2004
• OE / cross references: R5086894AA, R8004082AA
• Warranty: 2 Year (as listed)

Specs

• Part number: 0445120255
• Type: common-rail fuel injector
• Condition: New
• Manufacturer: Bosch
• Reman alternate: 0986435503

Best for stock or lightly modified trucks that need OE fuel delivery restored. Verify fitment for your truck before ordering.