1978 Mazda Cosmo Freeze and Expansion Plugs
Keep Your 1978 Mazda Cosmo in Top Shape with Quality Freeze and Expansion Plugs
Whether you’re repairing or upgrading your Freeze and Expansion Plug, using high-quality parts is key to keeping your 1978 Mazda Cosmo looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Expansion Plugs and Cylinder Head Expansion Plugs. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 1978 Mazda Cosmo Freeze and Expansion Plug at Advance Auto Parts is around $4.68, with a range that starts at $1.79 and goes up to $14.99. With 7 options in stock from one trusted brand, finding the right fit is easy. Popular picks like Dorman Rubber Expansion Plug 1-1/2 In. – Size Range 1-1/2 In. – 1-5/8 In. (Sold by each), 570-009, Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095, and Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380 (Sold by each), 555-093 start at just $1.79 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Freeze and Expansion Plug, don’t forget to check out other key components like Engine Timing Parts and Oil Cooler Parts. At Advance Auto Parts, we’re here to help you keep your 1978 Mazda Cosmo in peak condition, inside and out.
Find Your Specific 1978 Mazda Cosmo Freeze and Expansion Plugs
Looking for the perfect Freeze and Expansion Plug for your 1978 Mazda Cosmo? You’re in the right place. Below, you’ll find links to various types of Freeze and Expansion Plugs that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Freeze and Expansion Plugs, ensuring durability and a precise fit for your Mazda Cosmo. Whether you’re driving a 1978 model or another popular model year like
1976 and
1977, we’ve got you covered. Purchasing Freeze and Expansion Plugs from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Freeze and Expansion Plugs that fit your vehicle.
Essential 1978 Mazda Cosmo Freeze and Expansion Plugs
Dorman – Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095 (Part No.555-095)
from
$1.79
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Rubber Expansion Plug 1-1/2 In. – Size Range 1-1/2 In. – 1-5/8 In. (Sold by each), 570-009 (Part No.570-009)
from
$14.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450, 555-095.1 (Part No.555-095.1)
from
$3.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Pik-a-Nut – Dorman – Pik-a-Nut Steel Cup Expansion Plug 35.21mm, Height 0.380, 362648.1 (Part No.362648.1)
from
$2.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Pik-a-Nut – Dorman – Pik-a-Nut Steel Cup Expansion Plug 40.08mm, Height 0.450, 362780.1 (Part No.362780.1)
from
$3.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380 (Sold by each), 555-093 (Part No.555-093)
from
$1.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380, 555-093.1 (Part No.555-093.1)
from
$2.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Popular 1978 Mazda Cosmo Freeze and Expansion Plugs Categories
Most Popular Expansion Plugs for 1978 Mazda Cosmos
Enhance your 1978 Mazda Cosmo with one of the 5 Expansion Plugs we have in stock, starting at just $1.79.
Dorman – Pik-a-Nut – Dorman – Pik-a-Nut Steel Cup Expansion Plug 35.21mm, Height 0.380, 362648.1 (Part No.362648.1)
from
$2.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Rubber Expansion Plug 1-1/2 In. – Size Range 1-1/2 In. – 1-5/8 In. (Sold by each), 570-009 (Part No.570-009)
from
$14.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095 (Part No.555-095)
from
$1.79
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Pik-a-Nut – Dorman – Pik-a-Nut Steel Cup Expansion Plug 40.08mm, Height 0.450, 362780.1 (Part No.362780.1)
from
$3.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450, 555-095.1 (Part No.555-095.1)
from
$3.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Best-Selling 1978 Mazda Cosmo Cylinder Head Expansion Plugs
Upgrade your Cosmo with one of our 2 best-selling Cylinder Head Expansion Plugs.
Dorman – Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380 (Sold by each), 555-093 (Part No.555-093)
from
$1.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
Dorman – Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380, 555-093.1 (Part No.555-093.1)
from
$2.99
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.
See More
FAQs for 1978 Mazda Cosmo Freeze and Expansion Plugs
What are the best-selling Freeze and Expansion Plugs for 1978 Mazda Cosmos?
Out of 7 Freeze and Expansion Plugs that fit 1978 Mazda Cosmos, the following parts are the top sellers:
- Dorman Rubber Expansion Plug 1-1/2 In. – Size Range 1-1/2 In. – 1-5/8 In. (Sold by each), 570-009 (16140204) – $14.99
- Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095 (16140160) – $1.79
- Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380 (Sold by each), 555-093 (16140158) – $1.99
What’s the price range for 1978 Mazda Cosmo Freeze and Expansion Plugs?
The prices of Freeze and Expansion Plugs for the 1978 Mazda Cosmo range from $1.79 up to $14.99 for the most premium parts.
What is the average price of a Freeze and Expansion Plug for a 1978 Mazda Cosmo?
The average price for Freeze and Expansion Plugs for the 1978 Mazda Cosmo is $4.68. Keep in mind the variety of part types within our Freeze and Expansion Plug category, where you are likely to find a wide range of prices across a variety of parts and components.
What are the cheapest Freeze and Expansion Plugs for my 1978 Mazda Cosmo?
The cheapest 1978 Mazda Cosmo Freeze and Expansion Plugs we carry are:
- Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095 (16140160) – $1.79
- Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380 (Sold by each), 555-093 (16140158) – $1.99
- Dorman – Pik-a-Nut Steel Cup Expansion Plug 35.21mm, Height 0.380, 362648.1 (3492354) – $2.99
- Dorman Steel Cup Expansion Plug 35.21mm, Height 0.380, 555-093.1 (22972484) – $2.99
- Dorman – Pik-a-Nut Steel Cup Expansion Plug 40.08mm, Height 0.450, 362780.1 (3492710) – $3.99
Does Advance Auto Parts sell Freeze and Expansion Plugs for any other 1978 Mazda models?
Yes. We stock Freeze and Expansion Plugs for 2 other popular 1978 Mazda models. Some of the most popular are 1978 GLC Freeze and Expansion Plugs, 1978 RX-4 Freeze and Expansion Plugs, and 1978 B1800 Freeze and Expansion Plugs.
What are the top-rated Freeze and Expansion Plugs that fit the 1978 Mazda Cosmo?
The one 1978 Mazda Cosmo Freeze and Expansion Plug we have in stock is the Dorman Steel Cup Expansion Plug 40.08mm, Height 0.450 (Sold by each), 555-095. It costs $1.79.
What types of Freeze and Expansion Plugs do you sell for my 1978 Mazda Cosmo?
As of 8/2/26, these are some of the most in-demand types of Freeze and Expansion Plugs for a 1978 Mazda Cosmo:
Can I get help with 1978 Mazda Cosmo Freeze and Expansion Plug orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mazda Freeze and Expansion Plugs and more.
What is your return policy for Mazda Cosmo Freeze and Expansion Plugs?
Advance Auto Parts keeps returns simple. For new Mazda Cosmo Freeze and Expansion Plugs and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.