Denso DCRI300770 Diesel Injector
1.6L CDTi · DCRI300770
Remanufactured Denso DCRI300770 diesel injector for Vauxhall/Opel 1.6 CDTi applications. Direct replacement for Vauxhall Astra, Insignia, Mokka, Zafira and Opel equivalents with B16DTN and B16DTJ engines. Cross-references 2950500770, HU2950500770, 55570012, 95521531. OEM-tested and calibrated with full flow and leak-back verification on CR318 PRO test bench. Includes 12-month unlimited-mileage warranty. Supplied as an exchange unit — return your old injector within 30 days.
2
Engine codes
7
OE / cross-refs
4
Vehicle fitments
12mo
Warranty
Common failure symptoms
On the 1.6L CDTi platform, a failing Denso DCRI300770 injector typically presents as: hard starting or extended cranking; rough or uneven idle; loss of power under load; excess smoke from the exhaust; cylinder misfire or contribution fault codes.
When two or more of these appear together, suspect the injector before peripheral systems — a comparative leak-off test and live-data cylinder-balance review will isolate the failed unit without tear-down.
When two or more symptoms appear together, suspect the injector before peripherals (EGR, glow plugs, turbo). A live-data leak-off test on each cylinder is the fastest route to the failed unit.
What Causes These Injectors To Fail
The documented failure modes on this platform are: injector back-leak beyond specification; nozzle wear degrading the spray pattern; combustion gas leaks past the injector seat washer.
Internal wear cannot be repaired in situ — once delivery drifts outside calibration, remanufacture or replacement is the reliable fix.
How Workshops Diagnose DCRI300770 Faults
Run a comparative leak-off (back-leak) test across all injectors before condemning a single unit. Compare requested vs actual rail pressure in live data at idle and under load. Inspect injector connectors and wiring before replacing hardware.
Never condemn a common-rail injector on a fault code alone — codes identify the circuit or cylinder, while leak-off volumes and correction values identify the component.
How Every Unit Is Tested Before Despatch
Each remanufactured DCRI300770 is fully stripped, ultrasonically cleaned and inspected; worn components are replaced with OE-grade parts. The rebuilt unit is then calibrated on a common-rail test bench against the manufacturer's specification sheet — delivery, back-leak and response are all verified before the injector is sealed and despatched with its calibration data on file.
Every unit carries a 12-month parts warranty and free UK delivery.
Vehicle Coverage At A Glance
The DCRI300770 trusted family covers 4 verified vehicle fitments across 1 make: Vauxhall. Every fitment listed on this page is registry-verified — no scraped or assumed applications.
OE & Cross-References
DCRI300770 supersedes or cross-references 6 further OE numbers, including 2950500770, HU2950500770, 55570012, 55570012FB, 95521531 and 821035. Always match the reference etched on your failed unit's body — cross-references within a family are verified equivalents, but etched numbers remain the source of truth.
Related fault codes & engine guides
Trusted compatibility
OE / cross-references (6)
Confirm fitment by registration
Enter your UK registration to verify your vehicle is in this trusted family. We'll cross-check the engine code against B16DTN / B16DTJ.
Confirm fitment for your vehicle
Frequently asked
Related engine guides
Other Denso and same-platform injector families worth checking.
All cross-references in this family
Every reference below resolves to a PDP linked to this trusted family. DCRI300770, 2950500770, HU2950500770, 55570012, 55570012FB, 95521531, 821035.
Denso know-how from the Knowledge Centre
Identification, coding, fitting and the mistakes that cause comebacks.