1. Fuel Tanks & Filler Necks Deals
  2. sku: 24710702913063722
  3. TOYOTA 77390-12020

TOYOTA 77390-12020 Fuel Tank Overfill Check Valve

fits model: 4wd, Matrix. make: Toyota. year: 2003–2005.

77390-12020 Toyota Genuine 2003-2005 Matrix 4wd Fuel Tank Overfill Check Valve

( Manufacturer Part Number: 77390-12020 ), ( Part Type: Fuel Valve Tank Check ), ( Return: 30 Day ), ( Custom Bundle: No ), ( Fitment Type: Direct Replacement ), ( Fuel Type: Petrol ), ( Part: Toyota Oem 4wd Fuel Tank Over Fill Check Valve ), ( Fitment: 2003-2005 Matrix 4wd ), ( Country Of Origin: Japan )

Review TOYOTA Genuine Fuel Tank Overfill Check Valve fits MATRIX 4WD 2003–2005

The **Toyota 77390-12020 Fuel Tank Overfill Check Valve** is a critical yet often overlooked component designed specifically for the **2003 2005 Toyota Matrix 4WD models**, ensuring optimal fuel system performance and preventing costly damage. This precision-engineered valve is strategically installed between the fuel tank and the fuel pump assembly, serving as a vital safeguard against overfilling, which can lead to fuel spillage, vapor lock, or even engine damage. Crafted from high-quality materials, including durable rubber seals and a robust metal housing, the valve allows fuel to flow freely into the tank while automatically shutting off when the tank reaches its maximum capacity, preventing excess fuel from entering the system. This design not only protects the vehicle s fuel system from contamination and pressure buildup but also enhances fuel efficiency by minimizing waste. Whether replacing a worn-out or failed original component or upgrading for improved reliability, this **OEM-quality check valve** ensures seamless integration with the Matrix s fuel delivery system, maintaining proper fuel pressure and preventing leaks that could compromise engine performance. Ideal for both DIY enthusiasts and professional mechanics, this part is a straightforward yet essential upgrade for maintaining the longevity and efficiency of your 4WD Matrix s fuel infrastructure.

### **Pros and Cons of buying a Toyota 77390-12020 (2003-2005 Matrix 4WD Fuel Tank Overfill Check Valve)**

#### **Pros:**

The **Toyota 77390-12020 fuel tank overfill check valve** is a critical component for preventing fuel overflow and ensuring proper fuel system function. Here are the key advantages of purchasing this part:

1. **Direct Fitment** This is an **OEM (Original Equipment Manufacturer) part**, meaning it is designed specifically for the **2003-2005 Toyota Matrix 4WD** and will function exactly as the factory part. No modifications or adapters are needed.

2. **Prevents Fuel Spills and Overflow** The overfill check valve regulates fuel flow to stop excess fuel from entering the tank, reducing the risk of spills, vapor leaks, and potential fire hazards.

3. **Maintains Fuel System Efficiency** A properly functioning check valve ensures the fuel pump operates correctly, preventing issues like **flooded fuel injectors** or **vapor lock**, which can lead to poor engine performance or stalling.

4. **Prevents Fuel Vapor Leaks** The valve helps contain fuel vapors within the tank, reducing emissions and maintaining **EVAP system integrity**, which is important for passing emissions tests.

5. **Long-Term Reliability** Since it is an OEM part, it is built to Toyota s quality standards, meaning it should last as long as the original component if installed correctly.

6. **Easy Replacement** The part is relatively straightforward to install, especially if you have basic mechanical experience. Most owners can replace it in **30-60 minutes** with the right tools.

7. **Prevents Costly Fuel System Damage** A failing check valve can lead to **fuel leaks, pump failure, or even tank damage** if fuel overflows. Replacing it early avoids more expensive repairs down the line.

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#### **Cons:** While this is a solid OEM part, there are a few potential drawbacks to consider:

1. **Price** As an **OEM part**, it is more expensive than aftermarket alternatives. Prices typically range between **$50-$100**, depending on the seller. Aftermarket versions may cost significantly less but may not be as reliable.

2. **Potential Counterfeit Parts** If purchasing from an unknown seller (especially online), there is a risk of receiving a **fake or low-quality part**. Always buy from **reputable suppliers** (Toyota dealerships, authorized distributors, or trusted online marketplaces).

3. **Installation Challenges** While not extremely difficult, the **fuel tank is heavy and may require lifting**, which can be tricky without proper support. Some owners may need assistance or a **fuel tank jack** to safely remove and reinstall it.

4. **Fuel System Cleaning Required** If the old valve was leaking or failing, there may be **fuel residue or debris** in the tank. A thorough cleaning of the fuel system (or even a **fuel system flush**) may be necessary before reinstalling the new valve.

5. **Limited Availability Offline** If you re not near a **Toyota dealership or auto parts store**, finding this part may require **online ordering**, which could introduce shipping delays.

6. **Potential for Overkill if Not Needed** If the valve is **not the root cause** of your fuel system issues (e.g., a failing fuel pump, clogged filter, or bad sender unit), replacing just the check valve may not fully resolve the problem.

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### **Conclusion:**

The **Toyota 77390-12020 fuel tank overfill check valve** is a **highly recommended replacement part** for the **2003-2005 Matrix 4WD** if you are experiencing:

- **Fuel spills or leaks** around the fuel tank filler neck.

- **Engine stalling or hesitation** due to fuel system issues.

- **Failed emissions tests** related to the **EVAP system**.

- **Visible damage or wear** on the existing valve.

**OEM parts like this one are the best choice** for long-term reliability, but they come at a higher cost than aftermarket options. If budget is a concern, **high-quality aftermarket alternatives** (from brands like **Denso, ACDelco, or FRAM**) can be a cost-effective substitute, though they may not last as long.

---

### **Final Recommendation:** **Buy the OEM Toyota 77390-12020 if:**

- You want **maximum reliability** and **direct fitment**.

- You are **replacing a known bad or damaged valve**.

- You have **access to a reputable seller** (dealership, authorized distributor, or trusted online retailer).

- You are **prepared for the slightly higher cost** in exchange for **long-term performance**.

**Consider an aftermarket alternative if:**

- You are on a **tight budget** and can find a **high-quality aftermarket valve** (e.g., **Denso 23300-01001** or **ACDelco 12F100**).

- You are **not experiencing severe symptoms** (e.g., minor fuel spills rather than major leaks).

- You are **comfortable with a slightly lower lifespan** in exchange for savings.

**Before purchasing, verify:**

- The **exact model year and 4WD configuration** of your Matrix.

- The **condition of the rest of your fuel system** (pump, filter, lines).

- The **seller s reputation** to avoid counterfeit parts.

**Installation Tip:** If possible, have a **second person assist** with lifting the fuel tank, and **clean the tank area thoroughly** before reinstalling the new valve.

**Final Verdict:** **The OEM Toyota part is the best choice for most owners** who want **peace of mind and long-term reliability**, but aftermarket options can be a **budget-friendly alternative** if sourced carefully.

Details:

A in original packaging and part number tag must be intact. B in good condition .e. Our aim is your satisfaction. GENUINE OEM TOYOTA 03-05 MATRIX 4WD FUEL TANK OVERFILL CHECK VALVE.

TOYOTA 4WD FUEL TANK OVERFILL CHECK VALVE. Not installed, damaged due to incorrect installation, missing parts, hardware, or instructions.

part #: 7739012020 prices

  • $59.95-$143.50

specifications fueltanksysteme:

  • for models: 4wd, Matrix
  • for makes: Toyota
  • for years: 2003-2005
  • mpn: 77390-12020
  • part type: Fuel Valve Tank Check
  • return: 30 Day
  • custom bundle: No
  • fitment type: Direct Replacement
  • fuel type: Petrol
  • part: Toyota Oem 4wd Fuel Tank Over Fill Check Valve
  • fitment: 2003-2005 Matrix 4wd
  • country of origin: Japan

returns fueltanksysteme:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller

seller fueltanksysteme:

  • city: Canton, Michigan
  • rating: 0.0%
  • # reviews: 0

general fueltanksysteme:

  • condition: New
  • Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

payments fueltanksysteme:

  • credit card: Discover
  • wallet: Paypal
  • other

offer fueltanksysteme:

  • quantity: 1
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock
  • started: May 27, 2026

shipping fueltanksysteme:

  • service: Standard
  • cost: $0.00
  • class: Standard
  • transit: 3-7 Days
  • type: Fixed
for models: 4wd, matrix, for makes: toyota, for years: 2003-2005, part type: fuel valve tank check, return: 30 day, custom bundle: no, fitment type: direct replacement, fuel type: petrol, part: toyota oem 4wd fuel tank over fill check valve, fitment: 2003-2005 matrix 4wd, country of origin: japan,
category: auto parts > car truck parts accessories > air fuel delivery > fuel tanks filler necks, sku: 24710702913063722,
Toyota 77390-12020 Is Similar To:
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2 offers $59.95–$143.50 USD
  • New. Offer #1 priced at $59.95 + $0.00 shipping estimate = $59.95* total. TOYOTA FACTORY PART NO. GENUINE OEM TOYOTA 03-05 MATRIX 4WD FUEL TANK OVERFILL CHECK VALVE.FREE SHIPPING
  • New. Offer #2 priced at $143.50 + $0.00 shipping estimate = $143.50* total. FREE SHIPPING

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