Caterpillar 20R 0849 3920211 3512B Fuel Injector

Caterpillar 20R-0849 / 392-0211 Cat Reman Fuel Injector is a remanufactured fuel-delivery unit designed for Caterpillar 3500-series engines, including the 3512B. Cat reman injectors are rebuilt to factory specifications and marketed under part numbers 20R-0849 (reman unit) and 392-0211 (injector group), with listings confirming that the two designations describe the same injector assembly. Compatibility catalogs note use on 3506, 3508, 3512, and 3516 engines, making it a common replacement for injector failures in heavy equipment and on-site power units that rely on the 3512B. The injector type is identified in Caterpillar reman catalogs as an EUI (electronic unit injector) reman, reflecting Cat’s process for high-precision fuel metering, and it carries the Cat reman warranty terms (12 months in markets that publish the program), mirroring the coverage of new Cat parts. As a genuine Cat component, it is engineered to meet original specifications for timing and fuel delivery, delivering precise atomization and spray timing required by large-displacement CAT engines. This part is widely listed by Cat and reputable retailers as a replacement for the 20R-0849 / 392-0211 injector group, ensuring intended compatibility with the 3512B and related 3500-series applications.