A2C59511610 — Frequently Asked Questions
Verified answers about the Continental/Siemens VDO A2C59511610 1.8 TDCi (Lynx) Common Rail Injector (Ford Focus/Mondeo/C-MAX/Galaxy/S-MAX).
What is injector A2C59511610?
A Continental (Siemens VDO) solenoid common-rail diesel injector for the Ford 1.8 TDCi (Lynx/Duratorq) engine. Ford OE 4M5Q-9F593-AD (FINIS 1355051); Siemens equivalent 5WS40086.
Which vehicles use A2C59511610?
Ford Focus II/C-MAX, Mondeo IV, Galaxy II and S-MAX 1.8 TDCi (Lynx).
Is it solenoid or piezo?
It is a Continental/Siemens VDO solenoid common-rail injector.
Does A2C59511610 need coding?
Yes - code the injector correction value to the correct cylinder with Ford IDS when fitting.
What are the OE part numbers?
Ford 4M5Q-9F593-AD (FINIS 1355051) references this injector; the Siemens equivalent is 5WS40086.
Does it fit the PSA 1.6 HDi DV6?
No - despite similar Siemens part-number families, A2C59511610 is the Ford 1.8 TDCi (Lynx) injector. Confirm OE 4M5Q-9F593-AD before fitting.
What are the symptoms of failure?
Rough idle, vibration, hard starting, black smoke, power loss/limp mode and an EML.
Why does my 1.8 TDCi run rough?
A worn or leaking injector unbalances fuelling; read live cylinder-balance data and bench-test the suspect cylinder.
What causes these injectors to fail?
Poor fuel filtration, contamination and back-leakage wear - fix the cause first.
Does a remanufactured A2C59511610 perform like new?
A properly remanufactured injector is bench-tested and recalibrated on a Continental-capable tester, then coded with Ford IDS on fitment.