Bosch Common Rail Injector 0445110646 – OE-Level Fuel Control For VAG 2.0 TDI Engines

When a 2.0 TDI starts to rattle at idle, smokes on acceleration, or shows uneven fuel trims, the injector is usually the first place to look. The Bosch 0445110646 (Bosch no. 0 445 110 646) is a genuine-spec common rail diesel injector engineered for a wide range of Audi, Volkswagen, Skoda and SEAT 2.0 TDI applications 

Rather than a generic replacement, this unit is built to Bosch's original design for CRI2-18 injectors, giving you the same precision metering and quiet running your engine had when it left the factory.

 

 

To help parts managers and online buyers match the correct unit, list the major references clearly:

Bosch: 0445110646 / 0 445 110 646

VAG OEM numbers: 03L 130 277 J and 03L 130 277 Q 

Also used as an OE-equivalent for sets that cross to 0 445 110 647 / 0 445 110 369 and VAG codes 03L130277J / 03L130277Q / 03L130855C/X in aftermarket listings. 

If the existing injector or your catalog lists any of these numbers, this product page is targeting the right part.

 

 

This injector is specified for many VAG 2.0 TDI models, including but not limited to:

VW Amarok, Jetta, Crafter and other 2.0 TDI platforms 

Selected Audi, Skoda and SEAT passenger cars and light commercials running 2.0-litre common rail diesels 

Because trim codes and power outputs vary, it's best practice to confirm fitment by VIN or engine code in your store's FAQ or fitment checker.

 

 

Bosch's CR injectors are designed for extremely short injection intervals and multiple injections per cycle, with pilot, main and post-injections That's not just marketing language; it translates to real-world benefits when you install a fresh, correctly coded injector:

✔ Smoother, quieter running
Accurate pilot injection softens the combustion "knock" that drivers hear at idle and low load. Cylinders contribute evenly, so there's less vibration through the cabin.

✔ Stronger response with less smoke
Fine atomisation and precise timing mean more of the fuel burns inside the chamber instead of in the exhaust, so you get cleaner acceleration and happier DPF/oxidation catalysts.

✔ Improved fuel efficiency
When each injector meters the correct quantity, the ECU doesn't have to compensate with long-term trims. Over time that shows up as more consistent consumption figures.

✔ Fast, clean shut-off
Hydraulic closing of the nozzle needle gives a very sharp end to injection, avoiding dribble that can wash cylinder walls or trigger rough idle after hot running

 

 

On your independent site, move beyond "new injector" and give buyers specific reasons to choose this unit:

Genuine Bosch design: Built to OE specification for 2.0 TDI CR systems, not a generic pattern part. 

12-month warranty: Many Bosch distributors and specialist dealers back 0445110646 with a 12-month manufacturer or workshop warranty when installed by a professional. 

Individually coded: Each injector carries calibration data so it can be coded to the ECU (using ODIS, VCDS, etc.) for optimal correction values.

Ready-to-install assembly: Supplied as a complete common rail injector with solenoid, nozzle and internal filter; just add new sealing washer and clamp bolt.

 

 

For technicians landing on your product page, a short technical block builds confidence:

Diagnosis first – confirm injector faults using balance rates, leak-off tests or return-flow values; rule out wiring, compression and rail-pressure issues.

Always replace sealing washers and clamp bolts – these are single-use on most VAG 2.0 TDI engines.

Code the injector – after installation, enter the new IMA/ISA code into the ECU so correction factors match the physical injector.

Check for clean start & smooth idle – after bleeding air from the rail, verify there are no leaks and that idle smoothness and smoke levels have improved.

 

 

 

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