Siemens VDO / Continental 5WS40156Z Diesel Injector

DW10 / 2.0 HDi / 2.0 TDCi / D4204T · Remanufactured

DW10 / 2.0 HDi / 2.0 TDCi / D4204T Remanufactured Common Rail Injector

Shared engine codes

RHR, RHD, RHL, RHG, RHK, RHF, DW10CB, DW10BTED4, DW10CTED4, AZWA, AZWC, KLWA

Compatible vehicles

Common 5WS40156Z injector failure symptoms

Hard starting when warm / extended cranking; rough idle immediately after start; loss of power with rail-pressure faults (limp mode); white smoke on start-up; engine cutting out when hot. 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

Piezo injector internal leak-back rising with temperature; rail pressure failing to build during hot cranking; injector back-leak overwhelming high-pressure pump delivery; wiring/connector chafing causing injector circuit faults. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.

How workshops diagnose 5WS40156Z faults

Measure injector back-leak (leak-off) both cold and fully warm before condemning — this family's leak-back typically worsens with temperature. Compare requested vs actual rail pressure during cranking in live data. Piezo injectors must never be energised with solenoid-type test currents. Fit new sealing washers and follow the manufacturer classification/coding procedure after replacement. Never condemn a common-rail injector on a fault code alone.

How every unit is tested before despatch

Each remanufactured 5WS40156Z 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 5WS40156Z trusted family covers 23 verified vehicle fitments across 5 makes: Citroen, Fiat, Ford, Peugeot and Volvo. Every fitment listed is registry-verified.

OE & cross-references

5WS40156Z cross-references 24 further OE numbers, including 5WS40156, 562001510, AAA9858640010, 1980J5, 1317367, 1373550, 36000318 and 36000319. Always match the reference etched on your failed unit's body.

Related fault codes & engine guides

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