0445120065 Bosch High-Pressure Common Rail Diesel Injector – Precision Fuel Delivery from Rsolid Engine Parts
For European diesel engines that demand exact fuel metering, the 0445120065 diesel injector (Bosch compatible) is a proven solution. Whether you drive a BMW, Mercedes-Benz, or other premium diesel vehicle, this common rail injector plays a vital role in power output, fuel economy, and emissions control. At Rsolid Engine Parts, we supply fully tested, OEM-quality 0445120065 injectors that restore engine performance and reliability at a fraction of dealer costs.
1. Structural Features & Advantages
The 0445120065 injector is a solenoid‑type common rail injector manufactured to Bosch original equipment specifications. Its engineering focuses on durability and injection accuracy:
Advanced 7‑hole nozzle – Produces a finely atomized fuel spray for complete combustion, reducing particulate matter and improving cold start behavior.
Hardened hydraulic servo system – Controls needle lift with millisecond precision, allowing multiple injection events (pilot, main, post) for quieter operation.
High‑strength stainless steel body – Resists corrosion from biodiesel blends and moisture, preventing stuck plungers and internal leakage.
Precision‑ground solenoid coil – Delivers consistent magnetic force even after hundreds of millions of cycles, maintaining stable injection quantity across the injector’s life.
Key advantages for your engine:
Restores lost power and torque (especially noticeable under load)
Reduces engine knock and diesel clatter
Lowers fuel consumption by optimizing injection timing
Reduces white smoke on cold starts and black smoke under acceleration
2. Compatible Vehicle Models
The 0445120065 injector is widely used in 3.0‑liter diesel engines from European manufacturers. Below are common applications (always verify your original part number and engine code):
| Brand | Model Series | Engine Codes (examples) | Years (approx.) |
|---|
| BMW | 3 Series (E90/E91/E92/E93) 335d, 330d | M57Y, N57, M57D30 | 2006–2013 |
| BMW | 5 Series (E60/E61) 530d/535d, X5 (E70) 3.0d, X6 (E71) | M57, N57 | 2007–2013 |
| Mercedes-Benz | E‑Class (W212) E300/E350 BlueTEC, ML/GL/GLE 350 BlueTEC | OM642 | 2009–2016 |
| Land Rover | Range Rover, Discovery 3/4 (with 3.0 TDV6) | 306DT, 276DT | 2009–2017 |
Note: Always cross‑reference the Bosch part number 0445120065 with your vehicle’s injector before ordering. Some engines use a different calibration code.
3. Common Failures, Maintenance & Installation Tips
Typical failure symptoms of a worn 0445120065 injector:
Rough idle or cylinder misfire (detectable via balance test)
Excessive black smoke under hard acceleration
Hard starting, especially when the engine is warm
Fuel dilution of engine oil (rising oil level)
Failed leak‑off test (return flow > 40–50 ml/min at idle)
Preventive maintenance:
Change diesel fuel filter every 15,000–20,000 km – contaminated fuel is the #1 killer of common rail injectors.
Use only high‑cetane diesel from reputable stations.
Add a quality injector cleaner every 10,000 km to keep nozzle holes clear.
Perform injector return flow measurement at every major service (60,000 km).
Installation essentials (professional level):
Always replace the copper sealing ring and Teflon O‑ring – Reusing them will cause combustion blow‑by and soot contamination.
Clean the injector bore – Carbon deposits can prevent proper seating and cause incorrect protrusion.
Lubricate new O‑rings with clean diesel or assembly oil – Never use grease or engine oil (may clog the nozzle).
Tighten the clamp bolt to manufacturer torque – Typically 25–30 Nm + a specific angle (consult your workshop manual).
Code the injector – Each 0445120065 injector has a 6‑digit IQA (Individual Quantity Adjustment) code printed on its body. This must be programmed into the ECU using diagnostic software (BMW INPA/ISTA, Mercedes Xentry, Delphi, etc.). Failure to code will result in poor idle and uneven power.
Why Choose Rsolid Engine Parts?
Rsolid Engine Parts has built a reputation for supplying reliable diesel injection components. When you order the 0445120065 injector from us, you receive:
100% functional test – Each injector is bench‑tested for spray pattern, dynamic flow, and leak‑tightness before shipping.
Bosch‑compatible quality – Precision‑ground internals and genuine‑spec nozzles (no cheap clones).
Stock availability – Ready for same‑day or next‑day dispatch.
Competitive pricing – Save 35–50% compared to dealership parts.
Expert support – We help with coding and troubleshooting.
📧 Contact us for quotes or technical questions:
amy@rinjector.com – We typically reply within 24 hours.
