Bosch 0445120354 Common-Rail Injector — Euro-6 Precision For MAN TGX / TGS & Lion’s Coach

When a MAN 12.4L D2676 starts to crank longer when hot, feels lazy on hills, or leaves a light haze behind the bus, it's rarely "the engine getting old" - it's usually one drifting out of spec. The Bosch 0445120354 common-rail (Bosch 0 445 120 354) is an OE-pattern unit used across MAN TGX / TGS trucks and Lion's Coach buses with the D2676 Euro-6 12.4 L engine. It's widely cross-referenced to MAN numbers 51101006180 / 51.10100-6180 / 51101009180 and Bosch exchange 0986435650, so you can verify fitment by part number instead of guessing.

 

 

Professional databases and parts catalogs tie this to:

Engines: MAN D2676 LFxx / LOH31, 12.4 L, Euro-6, ≈324–353 kW  

Vehicles (examples):

MAN TGX / TGS 18.400, 18.440, 18.480 and similar 12.4 L variants Fab Heavy  

MAN Lion's Coach 440 / 480 and related Lion's Coach C / L models  

Key cross-references:

MAN: 51101006180, 51101009180, 51 10100 6180 / 9180  

Bosch: 0445120354 / 0 445 120 354 / 0986435650 / 0986 435 650  

If your old body is laser-etched 0445120354 or your EPC calls out 51101006180 for a D2676 engine, this is the family you're looking for.

 

 

Heavy MAN engines lean heavily on accurate common-rail control. A worn upsets three critical behaviours:

Rail pressure stability
As internals wear, return flow (leak-off) rises. The rail then struggles to reach target pressure, especially during hot start and sudden load changes. A fresh 0445120354 brings leak-off back into Bosch spec, helping the ECM hit its pressure targets quickly. 

Spray quality & emissions
This uses a precision nozzle (often listed as DLLA148P2382) and matched control valve F00RJ02175 / F00RJ02410 to generate a fine, consistent cone, trimming visible smoke on throttle-in and keeping Euro-6 after-treatment happier. 

Cylinder balance & driver feel
Flow-matched s keep every cylinder in the D2676 sharing the workload. From the driver's seat, that means smoother idle, less vibration through the cab, and more repeatable fuel figures over the week.

 

 

Brand / type: Bosch common-rail diesel , 

Bosch part numbers: 0445120354, 0 445 120 354 

Exchange / reman: 0986435650 / 0 986 435 650 for Bosch exchange units  

MAN OE refs: 51101006180, 51101009180, 51.10100-6180 / 9180  

Typical unit data: ~0.7 kg, packed size about 24 × 7 × 7 cm, supplied new in sealed packaging with calibration data where applicable.

 

 

To turn 0445120354 into a real improvement instead of just a new part:

Diagnose, don't guess
Run a leak-off (return-flow) test on all cylinders or check smooth-running corrections in the ECU. Replace only s that fall clearly outside the group unless mileage justifies a full set.

Prepare the head properly
On a D2676, clean the bore and seat thoroughly and install a fresh copper sealing washer and O-rings. Carbon at the seat can cause compression leakage and comeback faults.

Correct torque & clean lines
Fit the new 0445120354 / 51101006180 to MAN torque spec and only reuse high-pressure pipes if the manufacturer explicitly allows it.

Bleed & calibrate
Prime the system until the rail builds pressure smoothly. If your ECU supports it, input the 's calibration/IMA data so the controller can trim quantity cylinder-by-cylinder.

Prove the repair
After installation, check for:

Shorter hot-start times

Stable idle with reduced correction values

Less visible smoke in the 1,200–1,600 rpm band where coaches and tractors do most of their work

 

 

Based on live listings and catalog wording, you can safely use phrases like:

"0445120354 Bosch common rail for MAN TGX / TGS 12.4L"  

"0 445 120 354 fuel 51101006180 D2676 Euro 6" 

"Common rail 0445120354 0986435650 for MAN Lion's Coach 440"

 

 

 

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