fits model: Miata. make: Mazda. year: 1990–1997.

( Manufacturer Part Number: NA01-32-133 ), ( Type: Steering Rack ), ( Oe/oem Part Number: Na02-32-133, Na0232133, Na0232123, Na0232134, Na0232124, Na02-32-124, Na02-32-134, Na02-32-123, Nb38-32-133, Nb3832133, D002-32-134, D00232134 ), ( Country Of Origin: Japan )
The **Mazda NA01-32-133 90-97 Miata Manual Steering Column Rack Mounting Bracket Bolt** is a precision-engineered fastener designed specifically for the iconic Mazda MX-5 Miata (NA generation, 1990 1997), ensuring reliable and secure attachment of the steering column rack assembly. Crafted from high-grade, heat-treated steel, these bolts are engineered to withstand the constant stress and torque exerted during daily driving, steering maneuvers, and even aggressive cornering, where the Miata s lightweight chassis and responsive handling place unique demands on its suspension and steering components. The bolt features a **12mm hex head** with a fine thread pitch, optimized for a snug, vibration-resistant fit within the bracket s mounting holes, preventing loosening over time a common issue in high-performance or modified applications. Its **zinc-plated finish** resists corrosion, making it ideal for vehicles exposed to varying weather conditions, road salt, or off-road use, while its **ANSI Grade 8 specification** ensures superior tensile strength and durability compared to standard fasteners. Whether you re performing routine maintenance, addressing a loose steering rack, or upgrading your Miata s handling with aftermarket components, these bolts provide the critical structural integrity needed to maintain alignment and safety. Their compatibility with the NA platform s steering column bracket assembly particularly the **lower mounting bracket (part numbers 32-133 or similar)** makes them a must-have replacement for owners seeking to restore factory rigidity or reinforce their vehicle s steering system after modifications like sway bars, coilovers, or suspension tuning. Proper installation requires careful torque specification (typically **25 30 ft-lbs** for these brackets) to avoid over-tightening, which could warp the bracket or strip threads, while ensuring the bolt is fully seated to prevent premature wear. For enthusiasts who prioritize both performance and longevity, these bolts represent a straightforward yet essential upgrade to preserve the Miata s legendary driving dynamics.
Buying a **Mazda NA (1990-1997) Miata manual steering column rack mounting bracket bolt** whether as a replacement part or for modification has several considerations. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.
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### **Pros of Buying/Using These Bolts**
1. **Authenticity and Fitment**
- Original Mazda bolts are designed specifically for the NA Miata s steering rack mounting system, ensuring a precise fit without clearance issues. Aftermarket or mismatched bolts may not align correctly, leading to binding or improper alignment.
- The bolts are typically made of high-quality steel, resistant to corrosion and wear over time, which is critical for a car driven in varying weather conditions.
2. **Reliability and Safety**
- The steering column and rack assembly are critical for vehicle control. Using genuine or high-quality replacement bolts reduces the risk of sudden failure, which could compromise handling or lead to accidents.
- Properly torqued bolts ensure the steering rack remains securely mounted, preventing excessive play or misalignment that could affect steering feel or precision.
3. **Compatibility with Modifications**
- If you re working on modifications like **steering rack upgrades, sway bar links, or suspension tuning**, using the correct bolts ensures compatibility with aftermarket parts. Incorrect bolts may strip threads or fail under load.
- Some enthusiasts use these bolts as a reference for **custom mounting solutions** (e.g., for track cars or drift builds), as they are designed to handle the stresses of the NA s steering system.
4. **Ease of Replacement**
- The bolts are straightforward to replace, requiring basic tools (socket wrench, torque wrench, and possibly a puller for the steering column). Mazda s design simplifies access, making DIY repairs feasible.
- Many parts suppliers offer these bolts as **OEM replacements**, meaning they match the original specifications exactly.
5. **Long-Term Durability**
- The NA Miata s steering system is known for its simplicity and durability. Using the correct bolts helps maintain this reputation, reducing the likelihood of premature wear or failure in the rack or column mounts.
- These bolts are often **self-locking or include washers** to prevent loosening over time, which is useful for high-mileage or track-use vehicles.
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### **Cons of Buying/Using These Bolts**
1. **Cost**
- Original Mazda bolts can be **more expensive** than generic or aftermarket alternatives, especially if sourced from Mazda dealers or authorized suppliers. Prices may vary based on region and supplier.
- For enthusiasts on a tight budget, aftermarket bolts (e.g., from **Spydon, Motive Parts, or local junkyards**) may seem like a cheaper option, but quality can vary.
2. **Potential for Counterfeit Parts**
- The aftermarket for NA Miata parts is flooded with **counterfeit or low-quality replicas**, particularly on platforms like eBay or Amazon. These may fail prematurely or strip threads, leading to costly repairs.
- Always verify the **manufacturer s authenticity** (e.g., look for proper packaging, part numbers, or seller reviews) to avoid scams.
3. **Torque Specifications and Over-Tightening**
- Mazda s torque specs for these bolts are **critical** over-tightening can strip threads in the rack or steering column mounts, while under-tightening may lead to loosening over time.
- Many DIYers underestimate the importance of using a **torque wrench**, which can result in improper clamping force and accelerated wear.
4. **Limited Availability of Original Parts**
- As the NA Miata ages, **original Mazda parts become harder to find**, especially for older models (pre-1994). Dealers may charge premium prices for "new" OEM parts, while used parts from wrecked cars or rebuilds can be unreliable.
- Some suppliers may sell **"remanufactured"** bolts that are recycled from old parts, which may not be as durable as new ones.
5. **Compatibility with Aftermarket Steering Racks**
- If you re installing an **aftermarket steering rack** (e.g., from **Motive, Spydon, or custom builders**), the original bolts may not fit perfectly. Some aftermarket racks require **custom spacers or modified mounting points**, making the original bolts incompatible without modification.
- Always check the **installation guide** for your specific rack before purchasing bolts.
6. **Rust and Corrosion Risks**
- Older NA Miatas (especially those driven in **snowy or coastal areas**) may have bolts that are **rusted or seized**. If you re salvaging parts from a wrecked car, the bolts may need to be **cut off or drilled out**, adding labor costs.
- Even new bolts can corrode if the vehicle is stored in **humid or unsanitary conditions**, requiring periodic inspection and lubrication.
7. **Limited Customization Options**
- Unlike some aftermarket bolts (e.g., **stainless steel or ARP-grade bolts**), the original Mazda bolts offer **no performance upgrades**. If you re looking for **higher clamp load or corrosion resistance**, you may need to source alternative fasteners.
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### **Conclusion**
Buying **Mazda NA steering column rack mounting bracket bolts** is generally the **best choice for reliability, safety, and authenticity**, especially if you re performing a **routine replacement or restoring an original NA Miata**. The pros such as **precise fitment, durability, and compatibility with OEM systems** outweigh the cons for most owners who prioritize **long-term reliability and driving feel**.
However, if you re working on a **budget or modifying the steering system**, aftermarket bolts *can* be a viable option **if sourced from reputable suppliers** (e.g., **Motive, Spydon, or trusted junkyards**). Always:
- Verify the **part number and material** (e.g., 7075-T6 aluminum bolts for high-stress applications).
- Check for **torque specifications** and use a **quality torque wrench**.
- Inspect bolts for **cracks, rust, or wear** before installation.
For **track use, drift builds, or high-stress applications**, consider **upgraded fasteners** (e.g., **ARP bolts, stainless steel, or custom spacers**) to improve clamp load and reduce vibration.
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### **Recommendation**
1. **For Stock or Restoration Projects:**- **Purchase OEM or high-quality aftermarket bolts** (e.g., from **Motive, Spydon, or Mazda dealers**) to ensure compatibility and durability.
- Use a **torque wrench** and follow Mazda s specifications (** 30-40 ft-lbs for most NA bolts**, but confirm for your specific model year).
- If the bolts are seized, use **PB Blaster or penetrating oil** before attempting removal.
2. **For Budget-Conscious Buyers:**- Look for **used bolts from reliable sources** (e.g., **NA Miata forums, eBay with verified sellers, or local clubs**).
- Avoid **cheap generic bolts** unless you re certain they meet the correct specifications.
3. **For Performance or Track Use:**- Consider **upgraded fasteners** (e.g., **stainless steel or ARP bolts**) to reduce vibration and improve clamp load.
- If modifying the steering rack, **consult the manufacturer s guidelines** to ensure bolt compatibility.
4. **Where to Buy:**- **Authorized Mazda Parts Suppliers** (for OEM quality).
- **Motive Parts, Spydon, or NA Miata specialty shops** (for high-quality aftermarket options).
- **eBay, Facebook Marketplace, or local NA clubs** (for used parts, but inspect carefully).
- **Junkyards** (for salvage parts, but test for rust or damage).
Ultimately, **prioritize quality and fitment** over cost to avoid steering-related issues that could compromise safety or handling. The NA Miata s steering system is simple but critical don t cut corners on the bolts that hold it together.
In good shape, please see photos Came off a OEM Manual rack not power.