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Dorman 555-101 Engine Expansion Plug
| Brand | Dorman 555-101 |
|---|---|
| Describe Type | Cup Type |
| Material | Steel |
| Maximum Diameter | 0.805 |
| Minimum Diameter | 0.794 |
| Package Contents | Expansion Plug |
| Fits | Toyota, INFINITI, Ford, Nissan, and Mazda · 23 vehicles |
OE direct replacement. Matches the fit and function of the original engine expansion plug.
Steel construction. Built from quality material for reliable performance.
Cup type design. A practical engine core plug for sealing the opening securely.
Cross-references 22538793, 0093312010 and 9111291280 for the same application. See all 6.
Dorman 555-101 Engine Expansion Plug
Dorman 555-101 is a steel cup-type engine expansion plug made to match the fit and function of the original plug on specified vehicles. It is built for reliable sealing in engine core plug locations where a precise diameter matters.
Key Features
- Steel construction for engine block sealing applications
- Cup-type design for OE-style fit
- Maximum diameter: 0.805 in.
- Minimum diameter: 0.794 in.
- Direct replacement style for specified Toyota, INFINITI, Ford, and Nissan applications
- Part number: 555-101
Detailed Description
This Dorman engine core plug is engineered to match the original part’s fit and function on selected vehicles, including Toyota 4Runner, Toyota Tacoma, Toyota Tundra, INFINITI Q45, Ford Courier, and Nissan Sentra applications. The steel cup-type construction helps provide a secure seal in the engine block where the original expansion plug has worn, corroded, or failed. Dorman 555-101 is a practical OE-style replacement for 20 mm core plug service on the listed vehicles.
This part cross-references EPC-202 for the same application.
What It Helps Address
- Coolant leaks from a deteriorated engine core plug
- Corrosion at the original expansion plug location
- Loss of sealing at the engine block freeze plug opening
- Service replacement for damaged or missing cup-type plugs
- Fitment issues when restoring the correct 20 mm plug size
Installation Notes and Tips
- Verify the engine block opening size before installation; this plug is specified at 20 mm with a 0.794-0.805 in. diameter range.
- Clean the bore thoroughly so the sealing surface seats evenly.
- Use proper installation tools to avoid deforming the steel cup.
- Confirm the vehicle application and engine location against the listed fitment before service.
Quality Assurance
Manufactured by Dorman to match original part fit and function on specified applications. Built from quality materials for dependable engine sealing performance.
Compatible With 2003-2005 Toyota 4Runner, 2005 Toyota Tacoma, 2005 Toyota Tundra, 1997-2001 INFINITI Q45, 1988 Toyota 4Runner, 1988 Toyota Pickup, 1981-1982 Ford Courier, 1972-1979 Ford Courier, and 1982 Nissan Sentra.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Toyota | 4Runner | 4.0L | V6 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2005 | Toyota | Tacoma | 4.0L | V6 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2005 | Toyota | Tundra | 4.0L | V6 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2004 | Toyota | 4Runner | 4.0L | V6 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2003 | Toyota | 4Runner | 4.0L | V6 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2001 | INFINITI | Q45 | 4.1L | V8 | N/A | 3 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 2000 | INFINITI | Q45 | 4.1L | V8 | N/A | 3 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1999 | INFINITI | Q45 | 4.1L | V8 | N/A | 3 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1998 | INFINITI | Q45 | 4.1L | V8 | N/A | 3 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1997 | INFINITI | Q45 | 4.1L | V8 | N/A | 3 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1988 | Toyota | 4Runner | 3.0L | V6 | N/A | 20 mm; 11 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1988 | Toyota | Pickup | 3.0L | V6 | N/A | 20 mm; 11 Required; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1982 | Ford | Courier | 2.0L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1982 | Nissan | Sentra | 1.5L | L4 | N/A | 1 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1981 | Ford | Courier | 2.0L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1979 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1978 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1977 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1976 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1975 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1974 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1973 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
| 1972 | Ford | Courier | 1.8L | L4 | N/A | 2 Required; 20 mm; Package Quantity: 10; Dorman - AutoGrade - Boxed; Packaging Type: Box |
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