VolvoEngine Parts

3964404 — Fuel Injector 3964404 For Volvo Engine D12A340 D12A420 D12C Truck Fh12 Vhd Vn

This is a high-pressure fuel injector responsible for delivering precisely metered fuel into the combustion chamber at the correct time, essential for engine power and efficiency. Manufactured to Volvo's rigorous standards, it provides superior atomization and durability over a worn injector that can lead to incomplete combustion or leaks. Operators may notice a significant loss of engine power, rough idling, increased fuel consumption, or excessive black smoke when this fuel injector fails.

Fuel Injector 3964404 For Volvo Engine D12A340 D12A420 D12C Truck Fh12 Vhd Vn – Part No 3964404 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryEngine Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Inspect mating surfaces for wear before fitting. Use torque specs from service manual. Replace gaskets and seals as a set — reusing compressed gaskets causes oil leaks. Clean all oil passages with compressed air.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeFuel Injector
MaterialHardened steel and precision-machined components
ApplicationEngine fuel injection system
Service LifeReplace as needed based on diagnostic tests or performance issues
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A primary symptom of a failing fuel injector is a noticeable and significant reduction in engine power, often accompanied by rough idling or stalling. If ignored, fuel consumption will increase due to inefficient combustion, and excessive black smoke may be emitted from the exhaust. Continued operation can lead to cylinder bore washdown, oil dilution, and potential damage to pistons and rings.

Installation Tip

Ensure the injector bore in the cylinder head is exceptionally clean and free of any carbon deposits or debris before installing the new injector. Always use new sealing washers and torque the injector retaining clamp to the precise specification outlined in the service manual.

Service Note

When replacing fuel injectors, it is crucial to inspect the fuel rail for any debris and consider replacing the fuel filter and fuel lines if they show signs of wear or contamination.