0445110251 — Technical Research
Bosch solenoid common-rail injector for the earlier Volvo 2.4 five-cylinder D5/2.4 D (D5244T4/T5/T7) engine across the C30, S40, S60, S80, V50, V70, XC70 and XC90. Bosch exchange 0986435125; Volvo OE 30750283. Replacements are coded to the ECU. Failures are driven by poor fuel filtration, contamination and back-leakage. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
Bosch 0445110251 2.4 D5 (D5244T) Common Rail Injector (Volvo)
Bosch solenoid common-rail injector for the earlier Volvo 2.4 five-cylinder D5/2.4 D (D5244T4/T5/T7) engine across the C30, S40, S60, S80, V50, V70, XC70 and XC90. Bosch exchange 0986435125; Volvo OE 30750283. Replacements are coded to the ECU. Failures are driven by poor fuel filtration, contamination and back-leakage. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the 2.4 D5.
Excess back-leakage drops cranking rail pressure.
Out-of-range delivery or rail-pressure deviation cuts power.
Poor atomisation over-fuels the cylinder.
Cylinder-specific injector or fuel-metering codes.
- InstallationCode the injector value to the correct cylinder with VIDA/diagnostic before road test.
- InstallationRenew the copper combustion washer and leak-off seals; torque the clamp to spec.
- MisdiagnosisThis solenoid D5 injector differs from the later piezo 0445116081 - confirm the OE and Bosch number for the model year.
- WarningFix contamination (filter/water/debris) first; the D5 is sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Bosch injector 0445110251?+
A Bosch solenoid common-rail diesel injector for the earlier Volvo 2.4 five-cylinder D5/2.4 D (D5244T4/T5/T7) engine. Bosch exchange 0986435125; Volvo OE 30750283.
Which vehicles use 0445110251?+
Volvo C30/S40/V50, S60 I/V70 II, S80 II, XC70 and XC90 2.0/2.4 D5 (D5244T).
Is it solenoid or piezo?+
It is a Bosch solenoid common-rail injector - the later D5 (0445116081) is piezo.
Does 0445110251 need coding?+
Yes - code the injector value to the correct cylinder with Volvo VIDA when fitting.
What are the OE part numbers?+
Volvo 30750283 and 30731567 reference Bosch 0445110251; the Bosch exchange number is 0986435125.
How is it different from 0445116081?+
0445110251 is the earlier solenoid D5 injector; 0445116081 is the later piezo D5 unit. Confirm the model year, OE and Bosch number.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my Volvo 2.4 D5 run rough?+
A worn or leaking injector unbalances fuelling; read live back-leakage data and bench-test the suspect cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 0445110251 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Bosch plan, then coded on fitment.