0445120008 — The LB7 Injector That Keeps Duramax Trucks Moving

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When a single cylinder goes quiet on a work truck, the cost isn't just a misfire - it's lost hours, added fuel, and a hit to customer trust. The 0445120008 injector (also sold as 0 445 120 008) is a common-rail Bosch direct-fit designed to restore the lost cylinder on GM 6.6L Duramax LB7 engines (2001–2004.5). Replacing one injector fast is often the cheapest way to recover vehicle uptime - and because Bosch end-tests injectors to OE standards, choosing a proven 0445120008 often saves far more than the part's price.

 

 

• Part number: 0445120008 / 0 445 120 008.
• Type: Bosch common-rail fuel injector - direct fit for Duramax LB7 platform.
• Purpose: precise metering & atomization of diesel fuel to restore combustion balance and reduce smoke/rough idle.

 

 

Think of injectors as timing-and-fuel microcontrollers inside each cylinder. A tired or leaking injector forces the ECU to compensate, which raises fuel consumption and stresses turbochargers and after-treatment components over time. Swapping in a correctly specified 0445120008 restores spray pattern, inject duration and closing speed - returning smoother torque delivery and often eliminating single-cylinder faults without a full-engine teardown.

 

 

→ Primary application: GM 6.6L Duramax LB7 (2001–2004.5).
→ Common cross references found in catalogs: Bosch OEM numbers and GM references such as 97729095 / 97720661 (verify against your VIN/service manual before ordering).
→ Sold as New OEM, Exchange/Reman, and high-quality aftermarket - list condition clearly.

 

 

• Item: Common-rail fuel injector - Bosch 0445120008.
• Typical pack options: single, 4-pack, 8-pack (trade buyers often replace entire sets to equalize wear).
• Price band signals: varies widely by condition - OEM new at premium, reman/exchange cheaper; always show tested status and bench-data if available.

 

 

Confirm VIN/engine code and check pump compatibility - do not order by vehicle year alone.

Replace injector O-rings and seals during install; inspect manifold and cup seats for corrosion.

If selling reman units on exchange, clearly explain deposit and return window.

After install, clear codes and run a cylinder balance or road test to verify restored output. 

 

 

 

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