3904043 - Coilover O-Ring – Floating End Cap – 2.5

- €7,40

€7,40

€7,40 - €7,40

€7,40

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OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.

Brand Terrafirma

Coilover O-Ring seals the floating end cap of a 2.5-inch coilover damper.

Fitted between the end cap and the damper body bore, the O-ring retains the internal oil and gas charge and separates them at the floating piston. It is a service seal, renewed when the damper is rebuilt or resealed.

Alternative Codes

3904043

Available to order 2–3 weeks

Not currently in stock. Order now — typically ships within 2–3 weeks.

Need it faster? Contact us about express import (2–5 business days).

When will my order arrive?

This item is ordered from our supplier on request. Typical lead time is 2–3 weeks from order confirmation.

Netherlands / Belgium / Germany: 2–4 working days after dispatch.
Other EU countries + UK: 4–8 working days after dispatch.
Outside EU/UK: contact us for an estimate.

Need it faster? Express import available in 2–5 business days — contact us before ordering.

Job kits containing this part

This part is included in 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does this coilover O-ring seal?

This O-ring seals the floating end cap of a 2.5-inch coilover damper, sitting between the cap and the damper body bore to retain the internal oil and gas charge. It's a service seal renewed when the damper is rebuilt.

What's the difference between this O-ring and the 2.0-inch version, 3904006?

This one fits the 2.5-inch coilover bore diameter, while 3904006 is sized for the 2.0-inch coilover. Check your coilover's bore diameter before ordering, since fitting the wrong size won't seal properly.

Can this O-ring be reused when servicing a coilover?

It's best treated as single-use once the end cap has been removed, since the sealing face takes a compression set that reduces its ability to reseal. Fit a new one every time the damper is stripped down.