28565336 — Technical Research
Delphi solenoid common-rail injector for the VW Group EA288 TDI engine, primarily the 1.6 TDI (and shared 2.0 TDI variants) across VW, Audi, Seat and Skoda. VAG OE 04L130277AN and 04L130277BD. Replacements are coded to the ECU with the injector IMA correction value. Failures are driven by poor fuel filtration, contamination and back-leakage. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
Delphi 28565336 1.6/2.0 TDI (EA288) Common Rail Injector (VW/Audi/Seat/Skoda)
Delphi solenoid common-rail injector for the VW Group EA288 TDI engine, primarily the 1.6 TDI (and shared 2.0 TDI variants) across VW, Audi, Seat and Skoda. VAG OE 04L130277AN and 04L130277BD. Replacements are coded to the ECU with the injector IMA correction value. Failures are driven by poor fuel filtration, contamination and back-leakage. Key symptoms: Rough idle / vibration; Hard starting; Loss of power / limp mode; Black smoke. Common failure modes: Internal wear / high back-leakage; Water-in-fuel corrosion; Nozzle coking.
A leaking injector unbalances cylinder fuelling on the EA288 TDI.
Excess back-leakage drops cranking rail pressure.
Out-of-range delivery or rail-pressure deviation triggers derate.
Poor atomisation over-fuels the cylinder.
Cylinder-specific injector or fuel-metering fault codes.
- InstallationCode the injector IMA correction value to the correct cylinder with VCDS/ODIS before road test.
- InstallationRenew the combustion seal and clamp hardware; torque to spec.
- MisdiagnosisConfirm fitment by the full OE suffix (04L130277AN vs BD) and engine code, not just '1.6 TDI'.
- WarningFix contamination (filter/water/debris) first; EA288 injectors are sensitive to fuel quality.
- TestingBench-test across delivery and back-leakage points; verify spray pattern before refit.
What is Delphi injector 28565336?+
A Delphi solenoid common-rail diesel injector for the VW Group EA288 TDI engine (mainly 1.6 TDI, with shared 2.0 TDI variants). VAG OE 04L130277AN/04L130277BD.
Which vehicles use 28565336?+
Skoda Octavia III/Karoq, VW Golf VII, Audi A3 8V and Seat Leon/Ateca/Arona EA288 1.6 TDI (and some 2.0 TDI).
Is it solenoid or piezo?+
It is a Delphi solenoid common-rail injector.
Does 28565336 need coding?+
Yes - code the injector IMA correction value to the correct cylinder with VCDS/ODIS when fitting.
What are the OE part numbers?+
VAG 04L130277AN and 04L130277BD reference Delphi 28565336; alternates include 04L130277AK and 04L130277D.
Does it fit both 1.6 and 2.0 TDI?+
It is primarily the 1.6 TDI EA288 injector and is shared with some 2.0 TDI variants - always confirm the OE suffix and engine code.
What are the symptoms of failure?+
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.6 TDI run rough?+
A worn or leaking injector unbalances fuelling; read live correction data and bench-test the weak cylinder.
What causes these injectors to fail?+
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured 28565336 perform like new?+
A properly remanufactured injector is bench-tested and recalibrated to the Delphi plan, then IMA-coded on fitment.