Radiator Expansion Reservoir for Fiat Ducato, Peugeot Boxer, and Citroën Relay

Description

Check part compatibility by using our vehicle filter options below. If you find your car, this part is compatible.

The Radiator Coolant Expansion Tank (also known as the coolant reservoir or header tank) is an essential component of your vehicle’s cooling system that houses excess engine coolant and regulates pressure as the engine heats and cools. Designed for popular light commercial vehicles like the Fiat Ducato, Peugeot Boxer and Citroën Relay across various diesel engines (e.g., 2.2, 2.3, 3.0 L), this expansion tank collects overflow coolant from the radiator and helps maintain the correct coolant level for optimal engine temperature control. Replacing a cracked, leaking or discoloured coolant tank restores proper cooling system operation and helps prevent overheating and engine damage.
OEM Number: 1374132080, 1611966680, 1674058380, 1374133080, 167405838,
Fitting Position : Front Axle, Upper
Quantity : 1

Our SKU: TF1374132080_313
All our Radiator Coolant Expansion Tank For Fiat Ducato Peugeot Boxer Citroën Relay are OEM quality and reliable after market car parts. This Radiator Coolant Expansion Tank For Fiat Ducato Peugeot Boxer Citroën Relay is specifically compatible with Citroën: Relay, Fiat: Ducato, Peugeot: Boxer, .
Please use our make-model-year tool to check this part’s compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.
If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

• Essential Cooling System Component: Provides overflow storage and pressure regulation for coolant as heat causes expansion, helping keep engine temperatures stable.

• Improved Engine Protection: A properly functioning expansion tank helps prevent coolant loss and overheating — key to preventing costly engine damage.

• Wide Fitment Across Models: Designed to fit Fiat Ducato, Peugeot Boxer and Citroën Relay vans and panel trucks, with compatibility often covering multiple diesel engines like 2.2 L and 2.3 L variants.

• Includes Cap / Sensor Options: Many expansion tanks include the coolant cap and sensor port — making installation easier and eliminating the need for extra parts.

• OEM & Aftermarket Choices Available: Choose from direct OE-style parts (matching original part numbers) or quality aftermarket alternatives depending on budget and needs.

Frequently Asked Questions (FAQs)

Q1: What does the radiator coolant expansion tank do?
A: The expansion tank stores excess coolant pushed out of the radiator when the engine heats up, and feeds it back into the system as the engine cools — helping manage pressure and fluid levels in the cooling circuit.

Q2: How do I know if it needs replacing?
A: Look for cracks, coolant leaks, low coolant warnings, overheating, or discolouration of the tank. These are signs your expansion tank or cap may have failed.

Q3: Will this tank fit my van?
A: Many expansion tanks fit Fiat Ducato, Peugeot Boxer and Citroën Relay models — especially those from 2006 onward with diesel engines like 2.2 Multijet or 2.3 L variants. Always check your vehicle’s year and engine code for correct fitment.

Q4: Does it include the coolant cap?
A: Some tanks come with the coolant cap included, while others are sold as the tank only — check the product listing details before purchasing.

Q5: Can I install it myself?
A: Replacing the expansion tank is often a straightforward DIY job with basic tools, but ensure the cooling system is cool and depressurised before starting. If unsure, a professional mechanic can fit it safely.

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