038130073BN — Technical Research
Bosch Pumpe-Duse (PD) unit injector for VW Group 1.9 TDI PD engines. This is a camshaft-driven unit injector, NOT a common-rail injector. VW/Audi OE 038130073BN / 038130073BL; Bosch 0414720313. PD injector lobe wear on the camshaft is a known related failure. Key symptoms: Top-end ticking / tapping noise; Rough idle and misfire; Loss of power; White or black smoke. Common failure modes: PD camshaft injector-lobe wear; Unit-injector internal wear / poor metering; Injector copper seal / O-ring leakage.
Bosch 038130073BN (0414720313) VW 1.9 TDI PD Pumpe-Duse Unit Injector
Bosch Pumpe-Duse (PD) unit injector for VW Group 1.9 TDI PD engines. This is a camshaft-driven unit injector, NOT a common-rail injector. VW/Audi OE 038130073BN / 038130073BL; Bosch 0414720313. PD injector lobe wear on the camshaft is a known related failure. Key symptoms: Top-end ticking / tapping noise; Rough idle and misfire; Loss of power; White or black smoke. Common failure modes: PD camshaft injector-lobe wear; Unit-injector internal wear / poor metering; Injector copper seal / O-ring leakage.
Worn PD camshaft injector lobes and/or rocker contacts change the injector actuation and produce a tapping noise.
A worn or leaking unit injector under/over-fuels its cylinder.
Reduced or mistimed injection from a worn injector or worn cam lobe.
Poor atomisation or incorrect injection timing.
A failing unit injector affects start fuelling on its cylinder.
Injector seal leakage and PD cam wear debris can contaminate the oil.
- WarningOn the 1.9 PD, always inspect the camshaft injector lobes when diagnosing injector noise - a worn PD cam can mimic or accompany injector faults and must be addressed together.
- InstallationRenew the injector copper washer and O-rings, set the rocker/injector adjustment to spec, and torque correctly to prevent leakage and oil dilution.
- InstallationPD unit injectors are camshaft-driven, not common rail - fitting, timing and torque differ from CR injectors. Use the correct VAG procedure.
- TipUse good-quality VW 505.01 / PD-spec oil and correct change intervals to slow PD cam and injector wear.
What is 038130073BN?+
A Bosch Pumpe-Duse (PD) unit injector for VW Group 1.9 TDI PD engines. The Bosch number is 0414720313 and VAG OE numbers are 038130073BN / 038130073BL.
Is this a common-rail injector?+
No. It is a camshaft-driven Pumpe-Duse (unit) injector, so fitting, timing and testing differ from common-rail injectors.
Which engines use 038130073BN?+
The 1.9 TDI PD engines including BKC, BXE, BLS, BJB, BRU and BSW.
Which vehicles use this injector?+
VW Golf Mk5, Caddy, Touran, Passat B6, Jetta; Audi A3 8P; Seat Leon/Altea/Toledo/Ibiza; Skoda Octavia/Fabia/Superb 1.9 TDI.
What are the symptoms of a failing PD injector?+
Top-end ticking, rough idle/misfire, loss of power, smoke, hard starting and sometimes oil dilution.
Why does my 1.9 PD tick at the top end?+
PD camshaft injector-lobe wear is a known fault and can mimic or accompany injector issues - inspect the cam when diagnosing injector noise.
Is 038130073BN the same as 0414720313?+
Yes, 0414720313 is the equivalent Bosch number; 0414720404/0414720312 are related PD variants - verify the suffix by engine code.
Can I test PD injectors on a common-rail bench?+
No - PD unit injectors need a PD-capable bench that can drive the cam-actuated injector.
Do I need to code PD injectors?+
PD injectors are graded; the correct injector grade/adjustment should be set with VAG diagnostics for smooth running.
Why does the oil smell of diesel on a 1.9 PD?+
Injector seal leakage and PD cam wear can dilute the oil with fuel - investigate seals and the camshaft, and change the oil.
How do I make PD injectors last longer?+
Use correct PD-spec oil, keep to proper service intervals, and address camshaft wear promptly to protect the injectors.
Does a remanufactured 038130073BN perform like new?+
A properly remanufactured PD unit injector is bench-tested and recalibrated to the Bosch plan to restore original delivery.