0445110646 Bosch Common Rail Injector 03L130277Q for Audi Seat Skoda VW 2.0 TDI

Genuine new Bosch 0445110646 common rail injector (OE 03L130277Q and 03L130277J for Audi, SEAT, Skoda and Volkswagen) for the 2.0 TDI and 2.0 BiTDI diesel engine. Supplied new in the original sealed Bosch box, made in Turkiye, delivered with the nozzle sealing washer, and covered by a 1-year manufacturer warranty.

A solenoid common rail injector meters and atomises the diesel delivered from the high-pressure rail, restoring the correct spray pattern, smooth idle, clean starting and proper fuel economy on the 2.0-litre TDI engine. The Bosch internal type formula is CRI2-18. This injector is IMA coded, so the individual injector code printed on the unit must be written to the engine ECU after fitting.

Also known internationally as: Common Rail Injector (EN), Common-Rail-Injektor (DE), Injecteur Common Rail (FR), Iniettore Common Rail (IT), Inyector Common Rail (ES), Injector Common Rail (RO) - Bosch 0445110646 for Audi, SEAT, Skoda and Volkswagen 2.0 TDI diesel engines.

Key features

Product details

OEM cross-reference numbers

Compare your original injector number before ordering. The vehicle model alone is not enough to confirm fitment. These are the numbers listed as equivalent to the new injector 0445110646.

The Bosch numbers 0445110368, 0445110369, 0445110646 and 0445110647 are listed as equivalent for this application, 0445110646 and 0445110647 being the current Bosch numbers. 03L130855CX is the VAG number carrying the X (exchange) suffix, so an original injector marked with it came out of a reconditioned unit; it points to the same injector. A lower-cost Bosch Exchange (remanufactured) version, 0986435166, is also available.

Vehicle compatibility

Compatibility must always be verified by the original part number, OEM number, VIN or engine code. Model alone is not sufficient. The code in brackets after the model is the manufacturer's model type designation, and power is given in kW.

Technical information

Related diesel fuel system components

The Bosch fuel pressure regulator valve listed alongside this injector is mounted on the common rail on these VAG 2.0 TDI engines, at the opposite end of the rail from the rail pressure sensor. It is a separate component and is not interchangeable with the injector.

The same part appears under several names, all describing one component: fuel pressure regulator, fuel pressure regulator valve, pressure control valve, pressure regulating valve, rail pressure control valve, fuel pressure control valve, and DRV (Druckregelventil). Volkswagen Group used different variants depending on engine build, power rating, emissions stage and production date, so the correct code for your vehicle may differ; always identify the right part by the number stamped on the fitted valve, not by the vehicle model.

Compatibility note

The table above is a fitment guide, not a guarantee. Volkswagen Group changed injector specification within the same model and engine according to production date, emissions stage and equipment level. Before ordering, read the Bosch number printed on the injector body of the unit you are replacing, or send us your VIN and we will confirm the correct part.

Shipping and warranty

Frequently asked questions

How do I know the Bosch 0445110646 fits my vehicle? Match the number on your original injector to one of the cross-references above (03L130277J, 03L130277Q, 03L130855CX, or Bosch 0445110368, 0445110369, 0445110647), or check the compatibility table by engine code (for example CFFB, CFGB, CFHC, CJCA, CGLC, CLCA, CNFB, CKTC). If unsure, send us your VIN and we will confirm.

Is my OE number 03L130277J the same injector? Yes. 03L130277J and 03L130277Q are both VAG original-equipment numbers for this injector, 03L130277Q being the later one. Bosch supplies it as 0445110646 and 0445110647, superseding the earlier 0445110368 and 0445110369.

Does this injector have to be coded after fitting? Yes. The 0445110646 is IMA coded. Each injector carries its own calibration code, and that code must be written to the engine ECU with VAG diagnostic equipment against the cylinder the injector is fitted to. If the code is not entered, the engine will run rough, smoke or log injector adaptation faults even though the part is new.

Is the sealing washer included? Yes. Each injector is supplied with its nozzle sealing washer. The injector clamp bolt and the high-pressure line should be renewed according to the manufacturer's procedure.

Is this injector new or remanufactured? This listing is a genuine new Bosch injector supplied in the original sealed Bosch box, made in Turkiye. A separate lower-cost Bosch Exchange (remanufactured) version, 0986435166, is also available.

What is the difference between 0445110646 and the exchange number 0986435166? 0445110646 is the new-part number. 0986435166 is Bosch's remanufactured exchange equivalent of the same injector, rebuilt from a used core. Both are IMA coded and both must be coded to the ECU after fitting. Choose 0445110646 for a new unit.

Which fuel pressure regulator is fitted with this injector? On these VAG 2.0 TDI engines the fuel pressure regulator valve is mounted on the common rail and carries the Bosch number 0281006074 or 0281006075, listed by Audi, SEAT, Skoda and Volkswagen as 057130764AB and 057130764AA. It is also called a pressure control valve, a pressure regulating valve, a rail pressure control valve or a DRV. Identify it by the number stamped on the fitted valve, not by the vehicle model.

How many injectors does my engine need? The 2.0 TDI and 2.0 BiTDI is a 4-cylinder engine, so a full set is 4 injectors. Many workshops replace them as a set; contact us for set pricing.

Do you ship worldwide and how fast? Yes, we ship worldwide. Stock items benefit from same-day handling with tracked delivery.

Common symptoms of a failing common rail injector

On the 2.0 TDI a worn or leaking 0445110646 typically shows as long cranking or a no-start when cold, a rough idle with a knock from one cylinder, hesitation and loss of power under load, black or white smoke, higher fuel consumption, and cylinder-specific injector fault codes together with rail-pressure or injector-adaptation codes. Excessive back-leak on one injector bleeds rail pressure away and prevents the engine from building pressure at all, so the fault often looks like a fuel supply or high-pressure pump problem rather than an injector problem.

A second failure mode specific to this engine family is leakage past the injector seat into the cylinder head, seen as black carbon deposits around the injector body and a chuffing noise at idle; a seized injector then has to be extracted with a puller, and the injector bore and sealing face must be cleaned before a new unit is fitted.

A professional fuel-system test must be carried out before replacing any parts, to confirm the injector is the actual cause of the fault. Back-leak (leak-off) measurement on all four injectors, live rail-pressure data and injector correction values read with diagnostic equipment are what identify the faulty unit; replacing an injector on symptoms alone frequently leaves the original fault in place. A worn fuel pressure regulator valve on the rail produces very similar rail-pressure symptoms, which is why the regulator is checked in the same test rather than assumed good.

Installation and system check

Before any injector is fitted, the fuel system must be checked for contamination. This applies unconditionally, whatever caused the original fault, because a new injector installed into a contaminated system fails again in a short time.

Check the fuel filter and its housing, and the inlet screens of the solenoid valves on the high-pressure pump and on the rail (fuel metering unit and pressure regulating valve). This is where debris collects and where sticky deposits show first. Affected components are cleaned or replaced as required, including the tank, feed and return lines, filter housing and filters, rail and high-pressure pump; high-pressure lines and connector tubes are replaced, not cleaned. Finish with a flush, new filters and bleeding according to the manufacturer's procedure.

Because this injector is IMA coded, the final step is to write the injector code into the ECU for the correct cylinder and then run the manufacturer's adaptation procedure. Fitting a new injector into a system that has not been decontaminated, or leaving the IMA code unwritten, produces repeat failure or repeat faults within a short period and is not covered by warranty.