Fuel injector MERCEDES Classe V (638/2) 220 CDI 122 hp

The Mercedes-Benz OM646 220 CDI 122 hp engine, widely used in models from the early 2000s to mid-2010s, demands high-precision fuel injectors to maintain optimal combustion and emissions compliance. This category covers the full range of replacement injectors compatible with this motorization, addressing common failure modes such as uneven fuel distribution, hard starts, or excessive smoke from the exhaust.

Each injector in this range is sourced from a network of European remanufacturers and OEM suppliers, ensuring traceability and adherence to Mercedes-Benz specifications. The grossist model allows workshops to access these parts at competitive rates while benefiting from standardized packaging and batch traceability, reducing administrative overhead.

Professional uses by trade

Whether you are a professional mechanic diagnosing a faulty engine or an enthusiast performing a DIY repair, selecting the correct injector requires matching the vehicle’s model year, engine code, and power output to the part’s specifications.

• Le garagiste independant : Replace worn injectors during routine maintenance to restore engine smoothness and fuel efficiency without costly downtime.
• L'automobiliste depanne : Swap a failing injector on the roadside to avoid being stranded, using a pre-verified replacement from a trusted supplier.
• Le passionne qui fait lui-meme : Source a high-quality injector for a weekend project, ensuring compatibility with the OM646’s common-rail system.
• Der deutsche Kaeufer (DACH) : Bestellen Sie einen Austausch-Injektor für Ihren Mercedes OM646, wenn die Motorwarnleuchte auf ein Einspritzproblem hinweist.
• Le garagiste independant : Use injectors from this range to calibrate engines post-turbo replacement, ensuring balanced fuel delivery across all cylinders.
• L'automobiliste depanne : Order a spare injector for emergency kits, as OM646 injectors are prone to failure under high-mileage conditions.
• Der deutsche Kaeufer (DACH) : Wählen Sie einen generalüberholten Injektor für Ihren OM646, um die Lebensdauer des Motors zu verlängern und teure Werkstattaufenthalte zu vermeiden.

Range comparison

Below, you will find the exact injector references compatible with the Mercedes-Benz OM646 220 CDI 122 hp, each verified for fitment and performance by our technical team.

How to choose

Selecting the right injector involves more than matching the part number—consider the engine’s operating conditions, fuel system pressure, and expected lifespan of the component.

1. Prioritize injectors with a proven track record in OM646 applications to avoid premature failure and repeated replacements.
2. Check the injector’s resistance value to ensure compatibility with the engine’s ECU calibration and fuel pump specifications.
3. Opt for units with a protective coating to resist corrosion from diesel contaminants and moisture in the fuel system.
4. Verify the injector’s spray pattern consistency, as uneven distribution can lead to misfires and increased emissions.
5. Choose injectors packaged in sealed, anti-static containers to prevent damage during transit and storage.
6. Select suppliers that provide batch traceability, allowing you to track the injector’s origin and remanufacturing date.
7. For high-performance applications, consider injectors with a higher flow rate to support increased fuel demand without compromising reliability.

Storage & logistics

Injectors for the OM646 220 CDI must be stored in a climate-controlled environment, away from direct sunlight and humidity, to prevent seal degradation and internal corrosion. Bulk orders should be rotated based on first-in, first-out principles to ensure freshness, while single units require individual packaging to maintain their condition until installation. Always handle injectors with care, avoiding contact with magnetic fields or sharp objects that could damage the delicate internal components.

With over a decade of experience in diesel injection systems, our team has seen how a single faulty injector can cascade into engine damage—this is why we rigorously test each unit before listing it in our catalog.— autoKUR team

Related categories

Browse our other ranges:

• 200 CDI 102 hp
• High-pressure pump
• Gasket kit
• Core deposit
• Search by part reference
• Turbocharger

Useful references

For regulatory and sector references, see Reglement (UE) 461/2010 — pieces de rechange et garantie constructeur.