Bosch Guide: Choosing the Right Common Rail (HPCR) Injector

Bosch Invented for Life

The common rail system is a major advancement in diesel technology. Bosch launched its common rail system for
passenger car diesel engines in 1997, which provides diesel engines with quieter performance, improved fuel economy,
higher torque, and lower emissions.
Each individual engine cylinder houses a common rail injector. When one or more injectors need to be replaced, you may wonder what replacement options you have.

Bosch diesel fuel injector fall into three categories.

  • Genuine OE Injectors
  • Remanufactured Injectors
  • Injectors from an Authorized Bosch Common Rail Field Repair Location

Testing Proves it

Bosch conducted an intense evaluation of non-authorized injectors available in the market. Our evaluation included
testing on our EPS-815 test bench with Bosch patented Shot to Shot (SST) functionality including OEM (original
equipment manufacturer) specifications. After the testing was performed, Bosch did an injector tear-down for
More than 50 percent failed, and presented a significant hazard to the engine if installed in a diesel common rail
system. These hazards included:

  • Loss of power
  • Decreased fuel economy
  • Failure to operate after a short period of time
  • Increased Noise
  • No start
  • Smoke
  • Engine damage
  • Exhaust system damage

Non-OEM Approved Remanufactured Products

Not all remanufactured injectors are the same. The quality of any remanufactured injector depends on the remanufacturing process and components. During our testing process, we have found that many of the components
removed from non-authorized injectors were outside of the original design specifications and some had corrosion and
pitting, which compromises performance.

You might get a great deal on these non-OEM approved products, but you are taking a huge risk that these injectors may not be better than the one you are trying to replace.

What Can I Do?

Make sure your vehicle is being serviced by a reputable shop. Ask about the fuel system components used on your diesel engine to ensure they are from a Bosch approved supplier.

These injectors could operate for weeks or months before causing the engine and exhaust system to malfunction. One failed injector could lead to complete engine failure.

Bosch Remanufactured InjectorsAuthorized Bosch Common Rail Field Repair Location3rd Party Injectors
Produced with a mixture of new OE components and reconditioned OE componentsYY?
End of line testing using the exact OE test specificationsYY?
Guaranteed to offer OE performance YY?
Guaranteed to meet all emissions specsYY?
1 yr, Unlimited mileage warrantyYY?
Injectors built with parts with known or proven reliability and durabilityYY?
Continuous improvement, injector produced with the latest upgrades to components and specificationsYN?
Nationwide Bosch warranty coverageYY?
Built on a high speed, highly automated OE production lineY
Built with Bosch-designed tooling, fixtures and test equipmentY?
(Y) Has this feature, (N) Depends on manufacturer, (?) Unknown

Did You Know? Bosch is the leading OE supplier of diesel fuel injectors for
diesel passenger cars, SUVs, vans, and pickup trucks.

Jimmy Finch

Dallas Branch Manager, M&D Distributors

Jimmy Finch has over 33 years of experience in Diesel Engine Sales, Service and Repair. His experience started early in life at Texas Fuel Injection Service (an early acquisition of M&D) as a job with a means to an end. Somewhere in that 33 years this job turned into a fulfilling career. He started in the injector clean up department and has held practically every position leading up to his current role as Branch Manager of the Dallas, Texas location.

In his spare time, Jimmy enjoys spending time with his wife of 24 years, Priscilla. They are currently getting ready to make their way into the empty-nesters stage of life. He also enjoys the occasional hunting trip with friends and family and chasing down potential customers by the names off their trucks.

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