Siemens VDO / Continental A2C59511603 Diesel Injector

On the PSA-only 2.0 HDi run, a failing injector typically presents with cold-start hesitation that lasts 30 to 60 seconds longer than normal — the rail loses prime overnight while one cylinder bleeds fuel back through a worn seat. The second signature is a steady loss of pulling power above 2,500 rpm under load — the car simply will not push past 90 mph on a flat motorway. The third is intermittent EML triggered after long motorway runs where the ECU finally logs a P1351 / P1352 cylinder-imbalance code.

Because the 6DRH-coded engines are predominantly fitted to MPVs (807, 5008, C8, SpaceTourer), the failures are most visible to drivers who tow or carry heavy loads — the engine cannot mask the imbalance under load the way it can on light passenger-car duty.

Engine code coverage spans PSA 6DRHRH, 6DRHRE, 6DRHRG, 6DRHWB and selected RHV-series sub-codes used in PSA-only Euro 4 production. UK fitment includes Peugeot 407 / 407 SW / 5008 / 807; Citroen C5 / C5 Tourer / C8 / Dispatch / SpaceTourer; and a small number of Fiat Group rebadged Scudo / Ulysse 2.0 JTD vehicles fitted with the PSA-supplied DW10 engine.

A2C59511603 is closely related to the wider DW10 5WS40156Z family but is not interchangeable — the bore profile is matched to the PSA-only ECU calibration and the connector polarity is keyed differently. Confirm the OE marking on the unit you are removing before ordering across the two families.

Each A2C59511603 carries a sixteen-character IMA / IQA string printed on a foil label affixed to the top of the body. After fitting, the string must be programmed into the ECU on the correct cylinder index using PSA DiagBox / Lexia. Skipping the coding step will trigger an immediate P1351 / P1352 cylinder-imbalance code on first start.

The 6DRH ECU calibration is more sensitive to IMA accuracy than the broader DW10 calibration because it runs a tighter post-injection window for Euro 4 NOx targets. Read and enter the string carefully — a single character entered incorrectly will degrade fuel economy and reload the DPF.

A2C59511603 cores come almost exclusively off MPV chassis (Peugeot 807 / 5008, Citroen C8 / SpaceTourer) and consequently arrive with above-average mileage — most cores we receive are at or beyond 150,000 miles. The remanufacture flow accommodates that by running an extra metallurgical inspection on the control-valve seat: at high mileages on this engine, the seat shows micro-pitting that does not show up in a standard flow test but reduces injector life by 30,000-40,000 miles after re-use. Cores that fail the metallurgical inspection are condemned rather than re-used, even if they pass the bench flow test.

Reassembly uses a Continental DW10-pattern seat plate adjusted for 6DRH-specific tolerance. Output is a fresh sixteen-character IMA string and a Euro-4-tightened calibration certificate retained on file. Warranty: 12 months parts, free UK delivery, refundable core surcharge.