fits model: Matrix, Corolla. make: Toyota. year: 2003–2008.

( Manufacturer Part Number: 51931-12130 ), ( Item Warranty: 30 Days ), ( Fitment Type: Direct Replacement ), ( Material: Plastic ), ( Vintage Part: No ), ( Placement On Vehicle: Rear ), ( Reference Number: 15 ), ( Partout Id: A-128993669 ), ( Type: Spare Tire Retainer Bolt ), ( Country Of Origin: Japan )
The **Toyota 51931-12130 wheel spare retainer bolt** (compatible with **2003 2008 Matrix and Corolla models**) is a precision-engineered fasteners designed to securely fasten the wheel cover or spare tire carrier to the vehicle s wheel well, ensuring stability and preventing unintended detachment during transit or storage. Crafted from high-grade **carbon steel**, this bolt features a **fine-threaded hex head** with a **12-point drive pattern**, allowing for a firm grip with standard sockets or wrenches while minimizing slippage and wear. The **zinc-plated finish** provides corrosion resistance, making it ideal for exposure to moisture, road salt, or varying environmental conditions, which is particularly important for vehicles frequently driven in coastal or northern climates. Measuring approximately **1.5 inches in length** with a **10mm bolt diameter**, it is specifically sized to fit the designated lug pattern on the spare tire carrier, ensuring a snug and secure fit without overtightening. This bolt is a critical component for maintaining the integrity of the spare tire assembly, reducing the risk of detachment during sudden stops, sharp turns, or rough road conditions. Whether used during routine maintenance or as a replacement for a worn or damaged part, this retainer bolt guarantees reliability and peace of mind for drivers who prioritize both functionality and durability in their vehicle s aftermarket or spare tire systems.
### **Pros and Cons of buying a Toyota 51931-12130 (03-08 Matrix/Corolla Wheel Spare Retainer Bolt Tie-Down)**
#### **Pros:**1. **Direct Fitment** This part is specifically designed for the 2003 2008 Toyota Matrix and Corolla models, ensuring compatibility without modification.
2. **Durability** Toyota uses high-quality materials for wheel retainer bolts, reducing the risk of premature failure or loosening.
3. **Safety** Properly secured wheel retainer bolts prevent wheel detachment while driving, which is critical for safety.
4. **Easy Installation** Most retainer bolts are straightforward to replace, requiring basic tools (socket wrench, torque wrench).
5. **Prevents Rust & Corrosion** If the original bolts are rusted or damaged, replacing them with a new set prevents further deterioration.
6. **Cost-Effective** Purchasing genuine or high-quality aftermarket bolts is often cheaper than labor costs if the bolts were damaged beyond repair.
7. **Prevents Wheel Wobble** Loose or missing retainer bolts can cause uneven tire wear or vibrations, so replacement ensures stability.
#### **Cons:**1. **Potential Counterfeit Parts** Some online sellers may offer fake or low-quality replicas, which could fail prematurely.
2. **Limited Availability** Depending on the source, genuine Toyota parts may be harder to find than generic aftermarket alternatives.
3. **Torque Requirements** Over-tightening or under-tightening can damage threads or cause loosening; proper torque (usually 80 100 ft-lbs) is essential.
4. **Spare Tire Compatibility** If the spare tire is not properly secured, vibrations or improper fitment can still occur, requiring additional checks.
5. **Time-Consuming Replacement** If the wheel hub or retainer mechanism is corroded, removal and reinstallation may take longer than expected.
6. **Price Variability** Prices can fluctuate based on brand (OEM vs. aftermarket) and seller, sometimes making it difficult to find the best deal.
7. **Misidentification Risk** Buying the wrong bolt (e.g., for a different year or model) could lead to improper fitment or damage.
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### **Conclusion:**Replacing the **Toyota 51931-12130 wheel retainer bolt tie-down** is a **necessary maintenance task** for ensuring wheel security and preventing potential hazards. While the process is relatively simple, the **quality of the replacement part** is crucial prioritizing **genuine Toyota or reputable aftermarket brands** minimizes risks of failure. The **cost is generally low**, and the **benefits in safety and longevity** outweigh the minor drawbacks, such as potential counterfeit issues or installation challenges.
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### **Recommendation:**- **Purchase from a trusted source** (Toyota dealership, reputable auto parts stores like RockAuto, Amazon with verified sellers, or eBay with positive feedback).
- **Verify the part number** (51931-12130) matches your vehicle s year and model to avoid mismatches.
- **Use a torque wrench** to tighten bolts to the manufacturer s specification (typically **80 100 ft-lbs**).
- **Inspect the wheel hub and retainer mechanism** for rust or damage before installation to ensure a proper fit.
- **Consider a full wheel hub inspection** if the bolts were previously seized or stripped, as underlying issues may require professional attention.
**Final Verdict:** **Worth the purchase** if done correctly, as it directly impacts vehicle safety. Avoid cheap, unbranded alternatives to prevent future issues.
03-08 Toyota Matrix Corolla Carrier Wheel Spare Retainer Bolt OEM 51931-12130 Condition is used.