2.1L CDI · Remanufactured
2.1L CDI Remanufactured Common Rail Injector (Mercedes-Benz)
OM651, OM651DE22LA
Hard starting, especially cold; rough idle, uneven running or vibration; misfire and loss of power, limp mode in severe cases; white, black or blue smoke; knocking / ticking from the injector area, fuel smell, higher consumption. When two or more appear together, suspect the injector before peripherals — a comparative leak-off test isolates the failed unit without tear-down.
Early delphi piezo injector failures — widely documented on 2009–2011 om651 engines, addressed by a manufacturer service campaign; injector delivery drift with correction values out of range; injector leakage allowing fuel dilution of the engine oil in advanced cases. Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.
Check injector correction values across all four cylinders — an outlier identifies the failing unit. On early (2009–2011) engines with running complaints, injector history matters: many were replaced under the manufacturer campaign — verify which units are fitted. Monitor the engine-oil level on suspected leaking injectors. Injector coding is required after fitting — follow the manufacturer procedure. Never condemn a common-rail injector on a fault code alone.
Each remanufactured A6510704987 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.
The A6510704987 trusted family covers 9 verified vehicle fitments across 1 makes: Mercedes-Benz. Every fitment listed is registry-verified.
A6510704987 cross-references 7 further OE numbers, including A6510700587, 28342997, 28348371, R00002D, A6510700487, 28272472 and HRD351. Always match the reference etched on your failed unit's body.
UK diesel injector specialists supplying OEM tested and calibrated remanufactured injectors. Trusted by garages and mechanics nationwide with 12-month warranty on every part.