Bosch 0445120186 Common Rail Injector (0 445 120 186) | Fits MAN TGL/TGM & VW Constellation – Cross-Refs 51101006115, 07W130205A, Exchange 0986435568

A medium-duty truck injector isn't bought for horsepower-it's bought for predictability. If you're searching 0445120186, you're almost certainly trying to fix a drivability issue that hurts fleet uptime: long crank after a hot stop, uneven idle at traffic lights, smoke under load, or a nagging hesitation that doesn't always trigger a fault code. The Bosch 0445120186 (Bosch No. 0 445 120 186) is a genuine common rail injector that appears repeatedly in parts catalogs for MAN TGL / MAN TGM and VW Constellation applications, and it's frequently sold both as a new unit and as a Bosch exchange/reman option.

Rather than describing it as a "replacement," the best way to think about 0445120186 is as a combustion accuracy component: it restores consistent metering so the ECU can hold rail pressure targets, manage emissions strategies, and deliver the torque curve the engine calibration expects.

This injector is commonly identified and cross-referenced by multiple number systems. The most important ones to list on a Google independent site are:

Bosch injector: 0445120186 / 0 445 120 186

Bosch Exchange (reman): 0 986 435 568 / 0986435568

MAN OEM references shown with this injector family: 51101006115, 61101006115 (also seen: 51101009115)

VW reference frequently listed: 07W130205A

You may also see sellers mention related injector numbers like 0445120308 alongside 0445120186 (often shown in exchange/cross-ref lists).

 

Most online listings cluster 0445120186 around MAN medium-duty engines and trucks:

MAN TGL / MAN TGM (commonly listed with model-year ranges around 2009–2019 depending on catalog)

Engine families frequently shown: D0834 and D0836 variants (examples include D0834LFL67, D0834LFL60, D0836LFL66; and D0836LFL60 appears on certain listings)

VW Constellation appears in multiple aftermarket and UK listings for this injector number

Fitment best practice: match by Bosch number + OEM cross-ref (e.g., 51101006115 or 07W130205A) and confirm engine code/VIN-especially in fleets where trucks share platforms across years.

 

Common rail systems are closed-loop: rail pressure and injection quantities are adjusted continuously. When an injector starts to drift (return flow changes, response time slows, spray quality degrades), the engine may still run-but it becomes inconsistent, and that inconsistency is what operators feel.

Typical symptom patterns tied to injector imbalance include:

◆ Hard or slow starts (rail pressure build + cylinder balance issues)
◆ Rough idle / vibration (one cylinder fueling deviates)
◆ Smoke under load (incomplete combustion from poor atomization or timing compensation)
◆ Fuel economy creep (drivers compensate; ECU trims can't fully mask the drift)

Replacing the correct 0445120186 helps restore repeatable injection events, which in turn supports stable rail control and cleaner combustion-especially on stop-start routes where hot restarts and low-speed torque matter most.

Bosch's own Genuine OE injector positioning emphasizes end-of-line testing to OE specifications and manufacturing with OE updates-exactly the kind of reassurance fleets want when the goal is "fix it once."

 

 

Search results typically show two buying paths:

🆕 New genuine Bosch (often described as "brand new boxed unit," with a listed warranty)
♻️ Bosch Exchange / reman under 0986435568, commonly marketed for MAN TGL/TGM and linked to the same OEM numbers

For an independent site, clearly label whether you're selling new or exchange/reman, and state the cross-refs prominently (51101006115 / 07W130205A / 0986435568). That's exactly how workshop buyers compare listings.

 

Even the best injector can fail early if contamination remains in the system.

Before install
• Replace fuel filter; inspect for water/metal debris
• Verify return-flow balance if possible (helps confirm diagnosis)
• Clean injector seat and follow correct sealing procedure

After install
• Confirm stable idle and smoke-free load response
• Recheck for leaks after first heat cycle
• Follow any ECU coding/adaptation requirements your platform specifies (varies by application)

 

 

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