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Toyota 90404-51026 Genuine Intake Air Control Valve Union
Toyota 90404-51026 Genuine Intake Air Control Valve Union
✔ Toyota 90404-51026 Intake Air Control Valve Union — Genuine OEM Part
✔ Fitment: Fuel and emissions systems on select Toyota vehicles (1983-2000s, including Camry, Celica, 4Runner, RAV4) and rear differential breather modifications
✔ Direct replacement for factory union — no modifications required
✔ Manufactured to Toyota’s original specifications
✔ Genuine OEM quality — metal construction with corrosion-resistant coating
✔ Essential component — provides a secure connection for hoses in vacuum, fuel, and breather systems
Toyota 90404-51026 Genuine Union — for Vacuum Piping and Breather Applications
A collapsed or cracked hose, vacuum leaks in the intake manifold system, or difficulty attaching a hose for a differential breather extension — these are common signs that your union fitting may need replacement. This small metal union provides a secure connection point for hoses in a variety of engine and drivetrain systems. Replacing it with this genuine Toyota part ensures a leak-free seal and reliable performance.
This is a factory-original Toyota union (OE part number 90404-51026). It is a precision-machined metal fitting with a corrosion-resistant black coating, designed to provide a secure and durable hose connection in vacuum, fuel, and breather applications. This is the same part sold at Toyota dealerships.
When to Replace
When to Replace
Product Details & Highlights
Product Details & Highlights
Package Contents
Package Contents
FAQ
FAQ
Toyota 90404-51026 Genuine Intake Air Control Valve Union
OEM Part Numbers
• 90404-51026
Vehicle Fitment Table (OEM Compatibility)
Important Fitment Notes:
• Always verify by VIN – Fitment is determined by the specific engine code and application. Confirm your application before ordering.
• Versatile application – While the OEM name is "Intake Air Control Valve Union," this part is widely used by enthusiasts as a rear differential breather extension fitting for various Toyota and Nissan models .
• Hose size compatibility – For breather modifications, this union is compatible with 1/4" ID hose; 5/16" ID hose works with a clamp . For 3/8" tubing, a different part number (90404-51319) is required .
• Genuine Toyota quality – This is an OEM part, not an aftermarket or Chinese replica.
• Double-check your original part – Before ordering, confirm the part number printed on your old fitting or run your VIN through a Toyota OEM parts catalog for absolute certainty.
Condition
New (100% genuine Toyota packaging)
Product Type
Union (metal hose fitting)
Function
The union provides a secure connection point for hoses in vacuum, fuel, and breather systems, ensuring leak-free operation and proper system function.
Applications
This union is used in intake manifold vacuum piping, EFI systems, and is a popular choice for rear differential breather extension modifications on Toyota and Nissan vehicles .
Important: This fitting is designed for specific Toyota applications. Verify your application and hose size before ordering. If in doubt, send us your VIN before ordering.
Technical Specifications
| Brand | Toyota (Genuine OEM) |
|---|---|
| Part Number | 90404-51026 |
| Type | Union (hose fitting) |
| Material | Metal with corrosion-resistant coating |
| Number of Ports | 2 |
| Connection Type | Flange / barb |
| Condition | New (factory original) |
Warranty
Toyota's original manufacturer warranty applies. For claims, please contact your nearest Toyota authorized dealer with your proof of purchase. Warranty terms may vary by region — contact us before purchase if you need a warranty confirmation.