The injector part number 0445110251 is indeed the correct specification for the Volvo XC70 I (P2 platform) equipped with the 2.4 D5 engine, specifically covering the model years 2005 to 2007.
However, due to the transition between Euro 3 and Euro 4 emissions standards during these years, it is critical to verify your specific engine code before purchasing or installing this injector.
Here is the detailed breakdown:
1. Compatibility Details
While the XC70 "I" (Chassis code P2) ran from 2000 to 2007, the injector requirements changed significantly in 2005.
Model Years: 2005, 2006, 2007 (Facelift model).
Engine Codes: This injector fits the D5244T4 and D5244T5 (185 hp / 400 Nm) engines.
Verification: If your car has the 163 hp engine (D5244T2) manufactured in early 2005 or prior, it likely uses the older injector (Bosch 0445110017 or 0445110022), which is not compatible with this part.
2. OEM Cross-References
If you are searching for this part using Volvo’s original equipment numbers, the Bosch 0445110251 corresponds to:
3. Critical Installation Note: Coding (VIDA)
Unlike older mechanical injectors, the Bosch D5 common rail injectors in this model require coding (programming) to the Engine Control Module (ECM).
The Process: Each injector has a 6-digit alphanumeric code (e.g., 9A2B3C) printed on the side. When replacing these injectors, you must enter this code into the vehicle’s ECU using the Volvo VIDA diagnostic system.
Consequence: If you install these without coding them, the engine will run roughly, suffer from poor fuel economy, and may trigger a "Check Engine" light (often with injector-related fault codes).
4. Common Failure Symptoms for This Injector
If you are replacing this due to a failure, the Bosch 0445110251 units in the XC70 are known for:
"Chatter" or "Knocking": Excessive metallic noise from the engine bay, often due to pilot injection misfires or worn internal plungers.
Fuel in the Oil: If the injector seal fails or the injector body cracks internally, diesel fuel can leak past the piston rings and contaminate the engine oil, raising the oil level.
Hard Starting: Particularly when the engine is warm.
Summary Recommendation
Before purchasing a Bosch 0445110251 injector:
Check your engine code: Look at the label on the timing belt cover. If it says D5244T4 or D5244T5, this is the correct injector.
Check your current injector: If you have an injector in hand, look for the Bosch number. If it reads 0445110017 or 0445110022, you have the older Euro 3 system, and the 0251 will not work without a full ECU software conversion.
Where to buy:
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