Bosch 04L130277AC Diesel Injector

2.0L TDI · Remanufactured

VW Group EA288 2.0 TDI (DFGA/DEUA) Bosch CRI2.20 piezo injector

Shared engine codes

DFGA, DFGC, DEUA, DEUC, DBGA, DBGC, DFFA

Compatible vehicles

Common 04L130277AC injector failure symptoms

Unstable idle or shaking at idle; loss of power, poor acceleration or limp mode; diesel knock or metallic rattling, especially cold or under load; white or black smoke; hard starting; fuel smell or a rising oil level in advanced cases. When two or more appear together, suspect the injector before peripherals — a comparative leak-off test isolates the failed unit without tear-down.

What causes these injectors to fail

Injector delivery drift showing as deviation values out of range; injector electrical faults logging cylinder circuit codes; leaking or stuck-open injector diluting the engine oil with diesel. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How workshops diagnose 04L130277AC faults

Log injector correction values in diagnostic software — a large outlier identifies the weak unit. Check the engine oil for diesel dilution on suspected leaking injectors. EGR, DPF and fuel-pressure faults overlap with injector symptoms on the EA288 — confirm with leak-back and live rail-pressure data. Injector coding is required after fitting — follow the manufacturer procedure. Never condemn a common-rail injector on a fault code alone.

How every unit is tested before despatch

Each remanufactured 04L130277AC is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is calibrated on a common-rail test bench against the manufacturer's specification — delivery, back-leak and response verified — and despatched with a 12-month parts warranty and its calibration data on file.

Vehicle coverage at a glance

The 04L130277AC trusted family covers 9 verified vehicle fitments across 4 makes: Audi, Seat, Skoda and Volkswagen. Every fitment listed is registry-verified.

OE & cross-references

04L130277AC cross-references 4 further OE numbers, including 04L130277AT, 04L130277F, 0445110611 and 0445110612. Always match the reference etched on your failed unit's body.

Related fault codes & engine guides

Remanufactured diesel fuel injectors on a UK testing bench
UK's Leading Diesel Injector Specialists

Find the Exact Fuel Injector
by Vehicle Registration

UK diesel injector specialists supplying OEM tested and calibrated remanufactured injectors. Trusted by garages and mechanics nationwide with 12-month warranty on every part.