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Dorman 54212 Engine Coolant Reservoir Cap
Engine Coolant Reservoir Cap Replacement
Dorman 54212 is a direct replacement engine coolant reservoir cap for select Ford, Mercury, and Lincoln applications. It is built as a black plastic snap-on cap with a vented flip-top design to restore proper reservoir closure on vehicles that use this style of cap.
- Direct replacement for the original coolant reservoir cap
- Black plastic construction
- Snap-on attachment with flip-top design
- Vented, non-pressurized cap
- 43.5 mm diameter for the specified applications
- Fits select Ford Mustang, Thunderbird, Windstar, and Mercury Cougar applications
Fitment Details
Compatible with select vehicles that use this reservoir cap style, including Fits 1994-2004 Ford Mustang, N/A; Fits 1986-1989 Ford Mustang, N/A; Fits 1995-1998 Ford Windstar, N/A; Fits 1993-1997 Ford Thunderbird, N/A; Fits 1993-1997 Mercury Cougar, N/A; Fits 1990-1995 Ford Cougar, N/A; Fits 1990-1992 Ford Thunderbird, N/A; Fits 1990-1992 Mercury Cougar, N/A; Fits 1986 Lincoln Continental, N/A; Fits 1986 Lincoln Mark VII, N/A; and Fits 1986 Mercury Capri, N/A. This part cross-references Ford OE part number E6ZZ8K103A for the same application.
What This Part Helps Address
- Cracked coolant reservoir cap
- Lost or missing reservoir cap
- Loose closure at the coolant reservoir opening
- Damaged vented cap that no longer seals correctly
- Replacement needs on vehicles with the specified reservoir cap design
Installation Notes
Match the cap style, diameter, and attachment type to the original part before installation. This cap uses a snap-on, flip-top design and is not pressurized. Verify reservoir compatibility on the vehicle, especially on Ford Mustang, Thunderbird, Windstar, and Mercury Cougar applications listed above.
Quality Assurance
Dorman manufactures this cap as a direct replacement part engineered to match the original application requirements. The design supports a proper fit on the specified reservoir style and provides a straightforward replacement for the original engine coolant reservoir cap.
| Brand | Dorman |
|---|---|
| Part Number | 54212 |
| Attachment Type | Snap On |
| Color | Black |
| Diameter | 43.5 |
| Length (In) | 2.5 in |
| Material | Plastic |
| Package Contents | 1 Coolant Cap |
| Pressure Release Lever | No |
| Pressurized | No |
| Type | Flip Top |
| Vented | Yes |
| Width (in) | 2.5 in |
This part fits 45 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2004 | Ford | Mustang | 3.9L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 2004 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 2003 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 2002 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 2001 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 2000 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1999 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1998 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1998 | Ford | Windstar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1997 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1997 | Ford | Thunderbird | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1997 | Ford | Windstar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1997 | Mercury | Cougar | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1996 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1996 | Ford | Thunderbird | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1996 | Ford | Windstar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1996 | Mercury | Cougar | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1995 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1995 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1995 | Ford | Thunderbird | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1995 | Ford | Windstar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1995 | Mercury | Cougar | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1994 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1994 | Ford | Mustang | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1994 | Ford | Thunderbird | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1994 | Mercury | Cougar | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1993 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1993 | Ford | Thunderbird | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1993 | Mercury | Cougar | 3.8L | V6 | N/A | Engine Coolant Reservoir Cap, fits vehicles without Diagnostic Monitor in a Box packaging. |
| 1992 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1992 | Ford | Thunderbird | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1992 | Mercury | Cougar | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1991 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1991 | Ford | Thunderbird | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1991 | Mercury | Cougar | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1990 | Ford | Cougar | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1990 | Ford | Thunderbird | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1990 | Mercury | Cougar | 3.8L | V6 | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
| 1989 | Ford | Mustang | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1988 | Ford | Mustang | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1987 | Ford | Mustang | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1986 | Ford | Mustang | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. | ||
| 1986 | Lincoln | Continental | N/A | wo/Dipstick; To 6/86; Packaging Type: Box | ||
| 1986 | Lincoln | Mark VII | N/A | wo/Dipstick; To 6/86; Packaging Type: Box | ||
| 1986 | Mercury | Capri | N/A | Fits washer fluid reservoir cap on automatic transmission vehicles. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.