0445110478 — Frequently Asked Questions
Verified answers about the Bosch 0445110478 BMW N47 / N57 2.0d & 3.0d Common Rail Injector.
What is Bosch injector 0445110478?
A Bosch solenoid common-rail diesel injector for BMW N47 2.0d and N57 3.0d engines, part of a family shared across several BMW supersessions.
Which BMWs use 0445110478?
N47/N57-engined 1, 3, 5, 7 Series, X3 and X5 (2.0d and 3.0d) built roughly 2009-2018.
Is it solenoid or piezo?
It is a Bosch solenoid common-rail injector.
What BMW OE numbers cross to 0445110478?
Family BMW numbers include 13537810702, 13537810703, 13538572474 and 13538576298 - verify the exact number by VIN.
Do I need to code the injector after fitting?
Yes - programme the BMW injector adjustment (IMA) values so the ECU fuels each cylinder correctly.
What are the symptoms of a failing N47/N57 injector?
Rough idle/hunting, hard starting, limp mode, low or fluctuating rail pressure, black smoke and cylinder misfire.
Why does my N47 hunt at idle?
Carbon at the injector wells, a leaking injector or glow-plug faults are common causes - run a leak-off test and inspect before replacing parts.
Can a failed high-pressure pump damage these injectors?
Yes - HPFP break-up can send metal debris through the rail and injectors, so inspect the whole fuel system if the pump has failed.
Should I replace one or all injectors?
Diagnose each with a leak-off test and live correction values; on high-mileage engines failures often cluster, so check all.
Can I test 0445110478 on any bench?
Use a Bosch-capable common-rail bench so the N47/N57 test plan and leak-off targets are correct.
Why renew the copper washer?
It is a one-use crush seal; reusing it risks combustion blow-by and carbon build-up around the injector.
Does a remanufactured 0445110478 perform like new?
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan to meet original delivery and leak-off specs.