VolvoSeals & O-Rings

781-121EX Volvo Fh4 Fm4 Windscreen Washer Tank — Volvo FH4 FM4

This is a windscreen washer tank for Volvo FH4 and FM4 trucks, responsible for storing washer fluid to supply the washer system. It is manufactured to meet stringent Volvo quality standards, ensuring durability and leak-free operation unlike a cracked or degraded original tank. Operators may notice a lack of washer fluid or visible leaks from the reservoir area when this component fails.

Volvo Fh4 Fm4 Windscreen Washer Tank – Part No 781-121EX – Volvo Spare Part
Part Specifications
BrandVolvo
CategorySpare 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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Parts Trading Company  ·  Mumbai, Est. 1956  ·  Same-day dispatch  ·  Ships worldwide  ·  GST invoice included

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Installation & Application Notes

Cross-reference part number with serial number before ordering to confirm fitment. Keep original parts until new ones are confirmed correct. Record part numbers replaced for future reference.

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

Part TypeWindscreen Washer Tank
MaterialDurable plastic composite
ApplicationWindscreen washer fluid reservoir
Service LifeReplace as needed due to damage or degradation
CompatibilityVolvo FH4, FM4
ConditionNew — OEM specification aftermarket

Failure Symptoms

The first sign of a failing washer tank is often a persistent leak of washer fluid from the front of the vehicle. If left unaddressed, the fluid level will continue to deplete, rendering the washer system inoperable. This can significantly impair visibility in adverse weather conditions, creating a safety hazard.

Installation Tip

Before installing, ensure the mounting brackets are clean and free of corrosion to allow for a secure fit. Avoid overtightening the mounting bolts, which can crack the plastic tank.

Service Note

Inspect the washer pump and hoses for any signs of wear or damage while replacing the tank.