Dorman 555-104 steel cup expansion plug for precise, durable engine fit.
Dorman 555-104 plug installed in engine area helps restore seal and function.
Dorman 555-104 10-pack of steel plugs for economical replacement options.
Dorman 555-104 steel cup expansion plug for precise, durable engine fit.
Dorman 555-104 plug installed in engine area helps restore seal and function.
Dorman 555-104 10-pack of steel plugs for economical replacement options.

Dorman 555-104 Steel Cup Expansion Plug — 34.3 mm, 0.497 in, 10 Pack

OverviewThe Dorman 555-104 steel cup expansion plug is crafted to mirror the fit and function of the...
Vendor: Dorman
Availability: In stock
£32.74
£32.74
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Dorman 555-104 steel cup expansion plug for precise, durable engine fit.

Dorman 555-104 Steel Cup Expansion Plug — 34.3 mm, 0.497 in, 10 Pack

£32.74
Dorman 555-104 steel cup expansion plug for precise, durable engine fit.
Dorman 555-104 plug installed in engine area helps restore seal and function.
Dorman 555-104 10-pack of steel plugs for economical replacement options.

Dorman 555-104 Steel Cup Expansion Plug — 34.3 mm, 0.497 in, 10 Pack

£32.74
Description
Description
x

Overview

The Dorman 555-104 steel cup expansion plug is crafted to mirror the fit and function of the original part on select vehicles. With a robust steel construction and precise dimensions (34.3 mm diameter, height 0.497 in), this plug delivers a solid, reliable presence in the engine bay. It’s designed to perform under the demands of everyday driving and service intervals, offering a practical, straightforward replacement option when the original part is missing or fatigued.

Why this plug may be right for you

  • Direct replacement – matches the factory part for specific years, makes, and models to support a seamless installation.
  • Ideal solution – a dependable substitute when the original plug is missing or worn due to fatigue or maintenance history.
  • Durable construction – built from quality steel to help ensure long service life and steady performance.
  • Trustworthy quality – backed by a team of product experts with extensive automotive experience in the United States.
  • Ensure fit – for best compatibility, use the garage tool to enter your make, model, and trim level before purchasing.

What you get and how it helps in the real world

  • 10-pack convenience – economical, ready-to-use replacements for multiple vehicles or future maintenance.
  • Peace of mind – a solid, purpose-built plug designed to sit securely in place and restore original function where needed.

Whether you’re completing a restoration, performing routine service, or stocking a shop with dependable parts, the Dorman 555-104 plug offers a practical option rooted in automotive experience and a focus on reliable performance. This plug may help support proper engine compartment sealing and seating when the original part is unavailable or failed, without making guarantees about performance in every scenario.

FAQ

Q: What is the Dorman 555-104 steel cup expansion plug used for?

A: A direct replacement plug for select engines, restoring original seating and function where the original part is missing or worn.

Q: How many plugs are included in this package?

A: This listing includes a 10-pack of steel cup expansion plugs for multiple vehicles.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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