Bosch 0445110647 Common-Rail Injector — Unlocking Full TDI Torque For VW / Audi / Seat / Škoda 2.0 TDI

If your 2.0 TDI has begun to hot-crank longer, haze slightly at idle, or feel dull in the mid-range, one injector drifting out of spec can be the whole story. The Bosch 0445110647 common-rail injector is an OE-pattern unit engineered for VW Group 2.0 TDI (1968 cc) engines, used across Volkswagen, Audi, Seat and Škoda models. It's commonly paired with OEM numbers 03L130277J / 03L130277Q and is specified for vehicles such as Audi A3/A4/A5/Q5/TT, VW Amarok, Golf/Caddy/Passat/Tiguan/Touran, Seat Alhambra/Altea/Exeo/Leon and Škoda Octavia/Superb/Yeti. F-Diesel+3FridayParts+3DieselDB+3

 

 

Bosch's CRI2-series injector in code 0445110647 is cataloged for: 

Engine size: 2.0 L / 1968 ccm

Power range: ~120–177 hp (88–130 kW) depending on engine code

Typical engine codes: CJCA, CJCD, CGLA, CGLB, CGLC and other EA189/EA288-series 2.0 TDIs

Brand coverage:

Audi: A1, A3, A4, A5, Q3, Q5, TT

Volkswagen: Amarok, Caddy, Golf V/VI, Passat, Scirocco, Sharan, Tiguan, Touran, Crafter

Seat: Alhambra, Altea, Exeo, Ibiza, Leon, Toledo

Škoda: Octavia, Superb, Yeti

It is often listed alongside sister Bosch numbers 0445110369 / 0445110646 / 0445110688 / 0445110689, but for a direct swap you should match 0445110647 and the OE number on your original injector.

 

 

Modern 2.0 TDIs rely on multi-event injection (pilot → main) and extremely tight cylinder balance. The 0445110647 is built to restore:

1. Rail pressure stability
Internal leak-off is controlled, so the rail can reach its target quickly after crank and stay there under transient load. That means faster hot starts and less "hunting" in live data. 

2. Fine atomization
Bosch nozzle technology (e.g., nozzle family like DLLA162P2160 on paired kits) produces a very fine spray pattern, cutting grey smoke on tip-in and helping keep DPF and EGR hardware happier for longer.  

3. Cylinder-to-cylinder consistency
Matched flow characteristics across injectors make the engine feel smoother, quieter, and more responsive through the entire rev range.

 

 

Brand: Bosch (genuine or OE-pattern, depending on supplier)  

Type: High-pressure common-rail diesel injector

Part number: 0 445 110 647 / 0445110647

Typical OE refs: 03L130277J, 03L130277Q, 03L130855CX, plus reman numbers like 0986435166 / 0986435167 in some catalogs  

Fuel system: Bosch common-rail, electronic control

Condition (depending on listing): brand-new or Bosch-reman, usually supplied with protective caps and neutral or branded box

 

 

To turn this injector into a real improvement on a 2.0 TDI:

Diagnose first
Run a return-flow (leak-off) test and check correction values. Replace only the out-of-family unit unless mileage or failure mode justifies a full set.

Clean seat & renew seals
Carbon in the injector bore ruins sealing. Always fit a new copper washer and O-ring set and clean the seat with the proper tool.

Fit & torque correctly
Install 0445110647 / 03L130277J/Q to the torque specified in the workshop manual; avoid over-twisting the high-pressure line.

Code the injector (if required)
Many ECUs require entering the new injector's IMA/trim code so the controller can apply the correct correction map.

Prove-out
After bleeding the system, confirm stable rail pressure, smoother idle, and lower smoke at 1,500–2,000 rpm in a short road test.

 

 

"0445110647 injector for VW Audi 2.0 TDI"  

"Bosch common-rail diesel injector 03L130277J / 03L130277Q" 

"Replacement fuel injector for Golf / Passat / A3 / Octavia 2.0 TDI"

 

 

 

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