A6640170121 Diesel Fuel Injector for Ssangyong Actyon 2.0 XD D20DT

A6640170121 Delphi diesel fuel injector for Ssangyong Actyon 2.0 XD D20DT

The A6640170121 Delphi diesel fuel injector is supplied by Rayfuel as an aftermarket replacement for selected Ssangyong Actyon 2.0 XD D20DT. This product page is intended for diesel repair shops, vehicle and equipment owners, fleet buyers and parts distributors who have confirmed the complete number on the removed injector. Browse related products in our Delphi-system common rail injector range.

Rayfuel is the product brand for this listing. Delphi and all vehicle, engine or equipment names are system and application references only. The product is not presented as a genuine Delphi boxed component. Model names and photographs alone cannot prove fitment because production period, engine output, emissions configuration and regional specification can change the required injector.

Product Identification

• Primary part number: A6640170121
• OE and cross references: A6640170121, EJBR04501D
• Product type: Delphi-system common rail diesel fuel injector
• Application: Selected Ssangyong Actyon 2.0 XD D20DT
• Quantity: 1 injector
• Product brand: Rayfuel

The listed numbers are purchasing references for this product page. A reference written with different spacing, punctuation or a revision suffix can identify a related component, while a visually similar injector may use different calibration, nozzle, connector or control characteristics. Compare the complete marking on the old part instead of relying on body shape alone.

A6640170121 Delphi diesel fuel injector Application and Fitment

This injector is listed for selected Ssangyong Actyon 2.0 XD D20DT. Exact compatibility can depend on VIN, engine code, engine serial number, model year, rated output, control-system version and regional emissions configuration. Use an appropriate vehicle or equipment parts catalog and compare every OE number before purchase.

Use the image gallery to compare the electrical connector, high-pressure inlet, return connection, clamp or mounting area, body length and nozzle profile. These visual checks help identify obvious differences, but the OE number and application record remain the main fitment evidence.

Injector Function and System Performance

A common rail injector meters high-pressure fuel and delivers it into the combustion chamber at controlled timing and quantity. Correct operation supports starting, idle stability, balanced cylinder contribution, combustion control and response under load. Results also depend on clean fuel, correct rail pressure, sound wiring, engine compression and the condition of the pump, rail, filters and other injectors.

Common Signs This Injector May Need Diagnosis

• Hard starting or extended cranking
• Rough idle or uneven cylinder contribution
• Reduced power or hesitation under load
• Increased exhaust smoke
• Abnormal combustion noise
• Excessive injector return flow
• Injector or rail-pressure diagnostic fault codes

These symptoms do not prove injector failure. Contaminated fuel, restricted filters, air in the supply, pressure-control faults, wiring problems and mechanical engine issues can cause similar complaints. Professional diagnosis and suitable injector testing are recommended before replacement.

Installation, Coding and Cleanliness

Installation should be completed by a qualified diesel technician using clean working practices. Keep every fuel connection protected, inspect related lines and replace specified seals. Follow the service procedure for torque, leak testing and system priming. If the application uses injector compensation or trim information, confirm the correct programming procedure rather than assuming coding is always required.

Before You Order

Please confirm OE number, engine model or old part photos before ordering. Verify A6640170121, EJBR04501D and the complete application record. Delphi provides general diesel fuel-system information on its official fuel injection page. For part-number and photo comparison, use the Rayfuel contact page.

The A6640170121 Delphi diesel fuel injector is an OE-number-matched Rayfuel aftermarket replacement for confirmed applications. It should not be selected only by vehicle name, engine family or exterior appearance.

Rayfuel Supply and Support

Rayfuel supplies diesel injection components to repair shops, equipment owners, wholesalers, distributors and export buyers. Support includes part-number checking, old-part photo comparison, quantity quotations, mixed-parts inquiries, export packaging and fitment assistance before shipment.