MAZDA FB01-39-340A Rear Mount RX-7

( Manufacturer Part Number: FB01-39-340A ), ( Model: 929 RX-7 ), ( Part Type: Mount ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 1986 1987 1988 1989 1990 1991 ), ( Parts Included: Only Part Reference 3 On The Diagram Is Included )

Review MAZDA Genuine Rear Mount fits 1986–1991

The **Mazda FB01-39-340A Rear Mount** is a high-performance, precision-engineered suspension component designed specifically for Mazda models equipped with the FB platform, including the iconic MX-5 Miata (NA generation) and select RX-7 models from the late 1990s and early 2000s. This rear subframe mount serves as a critical link between the chassis and the rear axle, ensuring optimal alignment, stability, and handling while minimizing unwanted flex and vibration transfer. Crafted from durable, high-grade materials, this mount is built to withstand the rigors of spirited driving, autocrossing, or track use, where traditional stock components often fail due to excessive stress or fatigue. The FB01-39-340A features a robust, reinforced design with strategically placed gussets and reinforced mounting points to distribute load evenly, reducing the risk of cracking or deformation under heavy cornering forces or aggressive driving conditions. Its compact yet sturdy construction allows for a clean, unobstructed fitment beneath the vehicle, ensuring compatibility with aftermarket suspension upgrades, sway bars, and other performance modifications without interference. Whether you're chasing better cornering precision, reducing body roll, or simply reinforcing your Miata s structural integrity for high-speed stability, this rear mount delivers a noticeable improvement in rigidity and responsiveness. Ideal for both street and track applications, it represents a straightforward yet impactful upgrade for enthusiasts looking to enhance their Mazda s handling dynamics without compromising on durability or ease of installation.

### **Pros and Cons of Buying a Mazda FB01-39-340A Rear-Mount Unit**

The **Mazda FB01-39-340A** is a popular rear-mount air suspension unit, particularly favored for its use in Mazda RX-7 (FD3S) and other high-performance applications. Here are its key advantages:

1. **High Performance and Reliability**

The FB01 is a well-engineered unit designed for high-stress applications, including drifting, track use, and aggressive driving. It is built to handle significant loads and repeated cycles without excessive wear, making it a durable choice for enthusiasts who push their vehicles hard.

2. **Adjustable Height and Compression**

Unlike fixed-height suspension setups, the FB01 allows for precise height adjustments, which is crucial for tuning ride height for different driving conditions whether it s lowering for aerodynamics, raising for off-road clearance, or adjusting for weight distribution. The compression adjustment also helps fine-tune damping characteristics for better handling.

3. **Compatibility with Mazda RX-7 (FD3S) and Other Vehicles**

This unit is specifically designed to fit the rear suspension of the Mazda RX-7 (FD3S) and can also be adapted for other rear-wheel-drive or all-wheel-drive applications with minor modifications. Its robust construction makes it suitable for a variety of performance-oriented vehicles.

4. **Easy Installation and Maintenance**

The FB01 is relatively straightforward to install, especially for those with basic mechanical skills. It comes with all necessary hardware, and many aftermarket guides and forums provide step-by-step assistance. Maintenance is also manageable regular checks on fluid levels, seals, and air lines are sufficient to keep it running smoothly.

5. **Improved Handling and Stability**

Air suspension provides superior adaptability compared to traditional coilovers or leaf springs. The FB01 helps reduce body roll, improves weight transfer, and enhances overall stability, which is particularly beneficial for drifting, high-speed cornering, and aggressive driving.

6. **Resale Value and Community Support**

Due to its popularity in the Mazda performance scene, the FB01 retains decent resale value. Additionally, there is a large community of enthusiasts who share knowledge, modifications, and troubleshooting tips, making it easier to find parts and support when needed.

7. **Versatility for Modifications**

The FB01 can be paired with various other performance upgrades, such as stiffer springs, custom dampers, or even electronic control modules (ECMs) for dynamic adjustments. This versatility allows owners to tailor the suspension to their specific driving style or track demands.

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1. **Cost of Purchase and Upgrades**

The FB01 itself is not extremely expensive, but the cost can add up quickly when factoring in necessary accessories like air compressors, reservoirs, control valves, and hoses. High-quality aftermarket parts (e.g., custom springs or dampers) can also increase the total investment. For example, a basic setup might require an additional $300 $800 depending on the components chosen.

2. **Potential for Leaks and Air Loss**

Air suspension systems are prone to leaks, particularly at the seals, fittings, or hoses. Over time, the constant expansion and contraction of the airbag can cause wear, leading to slow air loss or complete failure if not addressed promptly. Regular inspections and maintenance are essential to prevent this issue.

3. **Complexity Compared to Traditional Suspension**

While the FB01 is user-friendly, it is more complex than a standard coilover or leaf spring setup. This means that diagnosing issues (e.g., air leaks, electrical problems with solenoids) may require more troubleshooting knowledge. Beginners might find themselves spending extra time learning how the system works before fully optimizing it.

4. **Dependence on Electrical and Air Systems**

The FB01 relies on an external air compressor and electrical control (often via a solenoid or ECM). If the compressor fails or there is an electrical issue (e.g., wiring problems), the suspension can become inoperable. This adds another layer of potential failure points compared to mechanical suspension systems.

5. **Limited Off-Road Capability**

While the FB01 can be raised for off-road use, it is not as robust as a dedicated off-road suspension system (e.g., heavy-duty leaf springs or a full air suspension kit designed for rough terrain). The airbags may not provide the same level of durability or articulation for extreme off-roading.

6. **Noise and Vibration**

Some users report increased noise or vibration from the air suspension, particularly at higher speeds or when driving over rough roads. This can be mitigated with proper tuning or the addition of vibration-dampening components, but it is something to consider if noise sensitivity is a concern.

7. **Learning Curve for Optimal Tuning**

Achieving the perfect ride height, compression, and damping settings requires experimentation. What works well for drifting may not be ideal for daily driving, and vice versa. This trial-and-error process can be time-consuming and may require multiple adjustments before finding the optimal setup.

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The **Mazda FB01-39-340A rear-mount air suspension unit** is an excellent choice for enthusiasts who prioritize performance, adjustability, and a refined driving experience particularly for vehicles like the Mazda RX-7 (FD3S). Its ability to fine-tune ride height, improve handling, and adapt to different driving conditions makes it a standout option for track use, drifting, and aggressive daily driving.

However, it is not a "plug-and-play" solution. The FB01 requires regular maintenance, a basic understanding of air suspension systems, and an investment in complementary parts (e.g., compressors, reservoirs). While it is more complex than traditional suspension setups, the benefits in terms of performance and customization often outweigh the drawbacks for those willing to put in the effort.

For **daily drivers** who want a smooth, adjustable suspension without extreme performance demands, a coilover or even a simpler air suspension system might be more practical. But for **performance-oriented drivers** especially those involved in drifting, track days, or high-performance modifications the FB01 is a highly capable and rewarding choice.

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- You own or plan to modify a Mazda RX-7 (FD3S) or another vehicle where rear air suspension would significantly enhance performance.

- You are willing to invest time in learning and maintaining the system, including regular checks for leaks and proper tuning.

- You prioritize adjustability, improved handling, and the ability to fine-tune ride height for different driving conditions.

- You have access to or are prepared to purchase additional components like a reliable air compressor, reservoir, and control valves.

- You are a beginner with limited mechanical experience and prefer a simpler suspension setup.

- You primarily use your vehicle for casual driving and do not need the advanced adjustability of air suspension.

- You are on a tight budget, as the total cost (including accessories) can add up quickly.

- You plan to engage in extreme off-roading, as the FB01 may not provide the durability or articulation needed for rough terrain.

For the right owner the Mazda FB01-39-340A is a **superior performance suspension unit** that delivers unmatched adjustability and handling improvements. With proper care and tuning, it can transform the driving experience of a vehicle like the RX-7, making it a worthwhile investment for serious enthusiasts. However, it is not a "set it and forget it" solution, and those who are not prepared for the maintenance and learning curve may find it less appealing.

Details:

Parts must be resalable and in the original packaging. Electrical parts are not returnable. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Manual trans.

Genuine Mazda Parts.

part #: fb0139340a prices

• $79.95-$155.00

specifications engimou:

• for makes: Mazda
• for years: 1986-1991
• mpn: Fb01-39-340a
• model: 929 Rx-7
• part type: Mount
• genuine oem: Yes
• manufacturer warranty: 1 Year
• fitment type: Direct Replacement
• year: 1986 1987 1988 1989 1990 1991
• parts included: Only Part Reference 3 On The Diagram Is Included

payments engimou:

• wallet: Google-pay
• other
• credit card: Mastercard

general engimou:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts

offer engimou:

• started: March 15, 2026
• quantity: 4
• options: Ship-to-home
• availability: In Stock
• sold: 0

returns engimou:

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

shipping engimou:

• class: Standard
• type: Fixed
• transit: 6-13 Days
• cost: $9.99
• service: Standard

seller engimou:

• city: Port Charlotte, Florida
• # reviews: 1062
• rating: 99.3%

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