Product Analysis: Common Rail Injector A6510702387 – Compatible with Delphi for Mercedes OM651 Engine
1. Basic Specifications & Parameters
The Common Rail Injector A6510702387 is a precision solenoid‑type fuel injector designed to be compatible with Delphi common rail systems for Mercedes‑Benz OM651 diesel engines. This injector serves as a high‑quality aftermarket alternative to the original Delphi or Bosch units, providing identical fit, flow, and electronic characteristics for reliable engine performance.
Key technical parameters:
Part Number: A6510702387 (also written as 6510702387, A 651 070 23 87)
Compatible System: Delphi common rail (DCRI) – suitable for OM651 engines with Delphi or, with proper coding, Bosch-based ECUs (consult Rsolid support)
Injector Type: Solenoid‑controlled, 7‑hole nozzle, high‑pressure common rail
Engine Application: Mercedes‑Benz OM651 (2,143 cc, 2.1L inline 4‑cylinder CDI)
Maximum Injection Pressure: 1,600 or 1,800 bar (depending on engine version – typically 1,600 bar for early Euro 5, 1,800 for later)
Number of Nozzle Holes: 7 holes (asymmetric pattern for precise combustion targeting)
Nozzle Hole Diameter: 0.108 – 0.120 mm (laser‑drilled, wear‑resistant)
Static Flow Rate (nominal) : 410 – 450 cc/30 sec at 100 bar (test oil, 20°C)
Coil Resistance: 0.85 – 1.15 Ω (at 20°C)
Peak current: 18 – 22 A (opening), hold current 8 – 12 A
Actuation voltage: 12V DC (peak & hold, ECU driven)
Body Material: High‑strength alloy steel, corrosion‑protected (zinc or manganese phosphate coating)
Seat / Needle design: Hardened ball and taper seat
Return fuel flow (max, idle) : ≤ 0.5 cc/min
High‑pressure connection: M14 x 1.5 threaded inlet with conical sealing seat
Low‑pressure return: Banjo bolt fitting (M12 x 1.5) with integrated O‑ring
Mounting: Single hold‑down clamp, M6 bolt, torque 22 – 25 Nm + 90°
Copper sealing washer: 14.5 mm OD x 9.5 mm ID x 1.5 mm (tapered combustion seal)
Quality assurance (per injector):
100% test on common rail test bench (up to 1,800 bar)
Coil resistance and inductance verification
High‑pressure internal and external leak test (no detectable drop)
Flow linearity over 5 test points (200, 400, 800, 1200, 1600 bar)
Return flow measurement at idle simulation
High‑speed spray pattern inspection (7 plumes, symmetrical, no dribble)
Pilot injection accuracy (for noise reduction)
2. Compatible Engines & Vehicle Applications
The A6510702387 injector is designed for Mercedes‑Benz OM651 engine family, which powers many passenger cars and light commercial vehicles. This part number is often used in lower‑power variants (e.g., 100 kW to 125 kW) compared to the A6510704987 (which suits higher outputs). Always verify the existing injector part number.
Engine family:
OM651 – 2,143 cc, inline 4‑cylinder, 16‑valve, common rail, turbocharged (single or twin turbo). Production years approx. 2008–2016 (Euro 5 and early Euro 6).
Specific compatible vehicle models:
Mercedes‑Benz C‑Class (W204) – C200 CDI (100 kW / 136 hp), C220 CDI (125 kW / 170 hp) – certain model years
Mercedes‑Benz E‑Class (W212) – E200 CDI, E220 CDI (early production, before 2012)
Mercedes‑Benz S‑Class (W221) – S250 CDI (some markets)
Mercedes‑Benz GLK‑Class (X204) – GLK220 CDI (2009–2012)
Mercedes‑Benz Sprinter (906) – 213 CDI, 216 CDI (2.1L OM651, lower power variants)
Mercedes‑Benz Viano / Vito (W639) – Viano 2.1 CDI (115 hp or 136 hp version)
Important compatibility notes:
The A6510702387 is one of several injector part numbers for OM651. It is generally used in lower power EURO 5 engines (pre‑2012). Higher power engines (150 kW / 204 hp) typically use A6510704987 or A6510701787.
This injector is Delphi‑compatible. Vehicles originally equipped with Delphi injectors (typically identified by part numbers starting with A651070…) are direct fit. For vehicles with Bosch injectors (e.g., 0445110xxx), compatibility may require ECU software update – contact Rsolid support before ordering.
Injector coding (IQA) is mandatory for all OM651 engines. Each injector has a unique 6‑digit Individual Quantity Adjustment code printed on its body. This code must be programmed into the ECU using Xentry/DAS, Autel, Launch, or Delphi diagnostic tool. Skip coding results in rough running, smoke, and possible derate.
For Euro 6 OM651 engines (2014+), verify the original injector part number – some later models use different injector designs (e.g., A6510703187). We can cross‑reference with your VIN.
3. Performance Advantages & Functional Improvements
Replacing old or faulty injectors with a high‑quality aftermarket A6510702387 (Delphi compatible) from Rsolid Engine Parts provides multiple benefits:
Restored Power & Drivability – Worn OM651 injectors cause hesitation, poor acceleration, and loss of top‑end power. New injectors recompute the factory power output (100–125 kW / 136–170 hp) with crisp throttle response. Drivers report the engine feeling “like new again”.
Improved Fuel Economy – Old injectors often have excessive return flow (leaking needle seat) or inaccurate flow rates, increasing fuel consumption by 10–15%. Our precision‑calibrated injectors restore nominal efficiency, saving hundreds of euros annually.
Cleaner Combustion & Reduced Smoke – The 7‑hole micro‑drilled nozzle provides excellent atomization, eliminating black smoke under load and reducing particulate emissions. This helps pass MOT/emissions tests that many OM651 vehicles fail due to worn injectors.
Smoother Idle & Less Diesel Knock – Correctly calibrated pilot injection (pre‑injection) dramatically reduces the characteristic “clatter” of OM651 engines. Our injectors restore quiet, vibration‑free idle.
Reliable Cold Starting – Weak solenoids or leaky needles cause extended cranking, especially in winter. Our injectors maintain tight sealing and fast electrical response, ensuring start‑up in seconds even at -20°C.
Eliminates Common OM651 Injector Failure Modes:
High return flow – leads to long crank, hard start, and fuel dilution of engine oil.
Nozzle coking – causes rough idle, misfire, and smoke.
Solenoid failure – intermittent cylinder cutout, P0262–P0265 DTCs.
Copper washer leakage – combustion gas in fuel rail, erratic rail pressure, and potential fire risk.
Long Service Life – With proper fuel filtration (OEM filter changed every 2 years / 40,000 km), these injectors can exceed 250,000 km of trouble‑free operation.
Installation & Coding Instructions (Essential):
Safety: Depressurize fuel system (remove fuse for fuel pump or ignition off for 10 min).
Remove old injectors – clean the bore thoroughly (carbon residue prevents proper seating).
Install new copper sealing washers and new return line O‑rings. Do not reuse old seals.
Torque hold‑down bolt in two stages: first 15 Nm, then final 22–25 Nm + 90° (use angle gauge).
Reconnect fuel lines, prime system (key cycle 4–5 times without starting).
Injector coding (IQA):
Write down the 6‑digit code printed on each new injector (e.g., “B2F3K9”).
Using a diagnostic tool (Autel MaxiSys, Launch X431, Xentry, Delphi DS150, or iCarSoft MB), navigate to OM651 engine ECU → Injector coding / IQA adjustment.
Enter the code for each cylinder in the correct order (cylinder 1 is timing chain end).
Save and clear fault codes.
Some ECUs require a “teach‑in” drive (10–15 minutes varied load).
Start engine – let idle for 2 minutes, check for fuel leaks. If engine runs rough, re‑check coding.
If you do not have a diagnostic tool, your local workshop can perform the coding quickly.
4. Why Choose Rsolid Engine Parts for A6510702387 Injector?
Rsolid Engine Parts (www.rinjector.com) is a specialist in diesel fuel injection systems. When you purchase the A6510702387 (Delphi compatible) from us, you receive:
New, Not Rebuilt – 100% new aftermarket injector, not a refurbished or used unit. Manufactured in IATF 16949 / ISO 9001:2015 certified facilities.
Full Test Validation – Each injector is tested on a common rail test bench. Test reports include flow curves, return flow, and spray pattern images – available on request.
Exact OEM Compatibility – Dimensional and electronic parameters match Delphi A6510702387 specifications. IQA code provided on every injector for easy coding.
Competitive Pricing – Factory direct pricing provides 40–60% savings over Mercedes dealer or genuine Delphi/Bosch prices. No compromise on quality.
Fast Worldwide Shipping – Large inventory ready to ship individually or as sets of 4. Express delivery via DHL, FedEx, UPS (3–7 business days).
Expert Technical Support – Need to verify fitment for your specific VIN or need help with IQA coding? Our diesel experts are available 24/7 via WhatsApp: +8615975376778. We assist DIYers and workshops alike.
Warranty – 12‑month / 80,000 km warranty against manufacturing defects, solenoid failure, or nozzle blockage under normal operating conditions with approved fuel and filters.
Complete Kits – We also supply copper sealing washers, return line O‑ring sets, and replacement fuel filters for OM651 engines.
Visit www.rinjector.com to see our full range of OM651 injectors (A6510702387, A6510704987, A6510701787, etc.) and other common rail parts for Mercedes, BMW, VAG, Ford, PSA, and more. For urgent orders, WhatsApp +8615975376778 with your vehicle details.
