Volvo Penta Unit Injector 3803843 / 3801441 / 21582096 / 21586294 for D9 Series
Product Summary
This is an electronic unit injector (EUI) for Volvo Penta D9 series marine and industrial diesel engines. Part numbers 3803843, 3801441, 21582096, and 21586294 are interchangeable, and cross-reference numbers include 3803848, 3801439, 3803637, and 20430583. The injector integrates the high-pressure fuel pump, solenoid valve, and nozzle into a single unit, ensuring precise fuel metering and injection timing. We supply it in three conditions: genuine OEM (currently out of stock), new aftermarket, and remanufactured (OEM reman and aftermarket reman available). Each condition has different availability and warranty – please review the details below. Fitment must be confirmed using your engine model and current part number.
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Product Function
The electronic unit injector combines the high-pressure pump, solenoid valve, and injection nozzle into one assembly. The engine ECU controls the solenoid to pressurize and inject fuel at the precise moment and in the exact quantity required for each cylinder. This design allows higher injection pressures, better atomization, and improved fuel efficiency compared with older mechanical systems. A faulty injector can cause rough idle, power loss, excessive smoke, increased fuel consumption, or engine misfire. Because D9 series engines rely on precise injection timing, injectors should be replaced or rebuilt when symptoms appear, and all units should be matched to the engine’s calibration.
Compatibility Information
Confirmed for the following Volvo Penta D9 series engine models:
- D9A2A
- D9-425
- D9-500
- D9-575
These part numbers are interchangeable: 3803843, 3801441, 21582096, 21586294. If your engine model is not listed, or if you are using a different part number, please contact us with your engine serial number and existing injector part number so we can verify compatibility.
To request a quote, please provide:
- Destination country
- Engine brand and exact model
- Serial number / year
- Current part number from your injector
- Photo of the existing injector (if available)
- Required quantity
- Preferred condition: Genuine OEM, Aftermarket, or Remanufactured
Product Information Table
| Field | Details |
|---|---|
| Brand | Volvo Penta |
| Product Name | Unit Injector (Fuel Injector) |
| Part Numbers | 3803843, 3801441, 21582096, 21586294 (interchangeable) |
| Cross-reference Numbers | 3803848, 3801439, 3803637, 20430583 (interchangeable) |
| Product Condition | Genuine OEM, Aftermarket, or Remanufactured |
| Compatible Engine Models | Volvo Penta D9A2A, D9-425, D9-500, D9-575 (marine & industrial diesel) |
| Application | Electronic unit injection system |
| Unit Type | Electronic Unit Injector (EUI) |
| Weight | 1.22 kg |
| Fuel Compatibility | Standard marine or industrial light diesel |
| Place of Origin | China |
| Warranty | OEM: 12 months; Aftermarket: 12 months; Remanufactured: 6 months |
| Availability | OEM: currently out of stock (no ETA); Aftermarket: in stock; Remanufactured: in stock |
| Packaging | Foam-lined cardboard box |
Product Condition Options
Genuine OEM (12-month warranty)
Original Volvo Penta factory injector. Currently out of stock; no confirmed restock date. If you need a genuine unit, please contact us to check current supply status or discuss alternatives.
Aftermarket (12-month warranty)
New, high-quality replacement injector manufactured to match OEM specifications. In stock, ready for immediate dispatch. A reliable, cost-effective alternative for routine engine maintenance.
Remanufactured (6-month warranty)
Professionally remanufactured injector, available as OEM reman or aftermarket reman. Each unit is disassembled, inspected, and tested to ensure proper function. Appearance is approximately 90% new. In stock. A budget-friendly option for older engines or emergency repairs. Actual appearance may vary slightly depending on core condition.
Packaging, Shipping & Warranty
- Packaging: Foam-lined cardboard box for protection during transit.
- Shipping: Worldwide shipping. Cost and transit time depend on destination and selected carrier.
- Warranty:
- Genuine OEM: 12 months
- Aftermarket: 12 months
- Remanufactured: 6 months
Full warranty terms are issued with the quotation.
- Important: Availability and delivery time must be reconfirmed at the time of order. OEM injectors are currently out of stock without an ETA; aftermarket and remanufactured units are typically dispatched within 3–5 days, subject to final stock confirmation.
How to Request a Quote
Click the “Request Quote” button or email us directly. Include the details listed in the Compatibility Information section above. We respond within 24 hours.
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Why Choose Us?
✅ Global Dynapac Parts Supplier – Fast shipping from multiple warehouses
✅ Quality Guaranteed – Original Dynapac packaging
✅ Technical Support – Compaction experts available
