Mazda RX-7 Subframe Cross Member for Sale | First Generation SA FB
$200.00
At a Glance
- Condition: OEM used high-tensile steel subframe cross member, structural integrity verified, mounting points inspected, classic-vehicle disclosure applies
- Availability: In stock for classic first-generation Mazda RX-7 applications
- Shipping: Free shipping to all 50 states, 5 to 10 business days on structural chassis components
- Application: Mazda RX-7 first generation (SA/FB chassis) 1979-1985 US market – Mazda’s classic rotary-engined sport coupe
- First generation ONLY: Not compatible with FC (1986-1991) or FD (1993-1995) subframes – substantially different subframe configurations across the three RX-7 generations
- High-tensile steel construction: standard subframe material with structural integrity for chassis-mounted subframe applications
- Rotary engine heritage: The RX-7 first generation used Mazda’s 12A rotary engine (early SA22C variants) and later 13B rotary engine (later FB variants) – distinctive Mazda rotary engineering
- Classic collector interest: First-generation RX-7 is highly collectible modern classic representing Mazda’s classic rotary heritage era
- 15 day replacement warranty on component defects, classic-vehicle disclosure applies
Description
About the Mazda RX-7 Subframe Cross Member
Need a replacement Mazda RX-7 first-generation subframe cross member (high-tensile steel)? Part Nests sources OEM used subframe cross members for classic first-generation Mazda RX-7 applications on the SA/FB chassis from 1979 through 1985 US market. Critical – this is for FIRST-generation RX-7 only. Not compatible with FC (1986-1991) or FD (1993-1995) subframes – substantially different subframe configurations across the three RX-7 generations. The RX-7 is Mazda’s classic rotary-engined sport coupe representing Mazda’s rotary heritage. Each subframe cross member is inspected for structural integrity and mounting points. Classic vehicle disclosure applies. Call (855) 634-4447 to verify RX-7 generation and year before ordering.
What Is Included and Not Included
| Detail | Description |
|---|---|
| INCLUDED | The subframe cross member as a bare frame, per the live FAQ. |
| NOT INCLUDED | Bushings, mounts, and fasteners, which are reused or replaced separately per the live FAQ; engine brackets and steering components. |
| Tools You Need | Standard hand tools, jack stands or a lift, and support equipment for the engine during the swap; a wheel alignment afterward. |
Mazda RX-7 First Generation Context (SA/FB, 1979-1985)
- Mazda’s classic rotary sport coupe: The Mazda RX-7 is Mazda’s classic rotary-engined sport coupe representing Mazda’s distinctive rotary engineering approach. First generation (SA/FB chassis) produced from 1979 through 1985 US market established the RX-7 nameplate and Mazda’s rotary sport coupe positioning
- SA and FB chassis designations: First-generation RX-7 uses SA and FB chassis designations. SA22C is the early first-generation chassis code. FB is the later first-generation chassis designation. Same underlying first generation with progressive updates across the model years
- Rotary engine variants: Early first-generation RX-7 used Mazda’s 12A rotary engine (naturally aspirated Wankel rotary). Later first-generation RX-7 used the 13B rotary engine (larger displacement rotary variant). Distinctive Mazda rotary engineering with unique two-rotor Wankel configuration providing smooth power delivery in a compact engine package
- Second and third generation successors: The first-generation RX-7 was succeeded by the second-generation FC RX-7 (1986-1991) and the third-generation FD RX-7 (1993-1995 US market). Each generation used different chassis and different subframe configurations – subframes are NOT interchangeable between generations. FD RX-7 introduced twin-turbocharged 13B-REW rotary engine representing peak Mazda rotary engineering
- Classic collector interest: First-generation RX-7 is highly collectible as a modern classic representing Mazda’s classic rotary heritage era. Appreciated for its distinctive Mazda styling, rotary engine character, and represents a specific era of Japanese sport coupe engineering. Well-preserved first-generation RX-7s are increasingly appreciated in the modern classic Japanese sport compact enthusiast community
Mazda Rotary Heritage Context
- Mazda rotary engine heritage: Mazda is notable for its extensive commitment to rotary (Wankel) engine technology across multiple decades – unusual approach in the automotive industry where most manufacturers use conventional reciprocating piston engines. Mazda produced rotary engines across various vehicles including the RX-7 (this application), RX-8 (successor to the FD RX-7, produced 2003-2012 with Renesis rotary engine), and various other classic Mazda rotary vehicles
- Related classic Mazda sport coupes: Classic Mazda sport coupes from related eras include the MX-3 (subcompact sport coupe with K8-DE 1.8L V6 – see our related Mazda MX-3 dashboard listing) and MX-6 (sport coupe, Ford Probe sibling – see our related Mazda MX-6 center console listing). Different engineering approach vs the rotary-engined RX-7 but part of Mazda’s broader classic sport coupe heritage
- Rotary engine characteristics: Mazda rotary engines (Wankel design) use rotating rotors instead of reciprocating pistons – fundamentally different engineering approach from conventional piston engines. Advantages include smooth power delivery, compact engine packaging, and high RPM capability. Trade-offs include specific rotary maintenance requirements and different fuel efficiency characteristics vs conventional piston engines
Mazda Vehicle Lineup Context
- Mazda MX-3: Classic subcompact sport coupe with K8-DE 1.8L V6 – see our Mazda MX-3 dashboard listing
- Mazda MX-6: Classic sport coupe (Ford Probe sibling) – see our Mazda MX-6 center console listing
- Mazda 3: Modern compact sedan / hatchback – see our Mazda 3 water pump listing
- Mazda 5: Discontinued compact minivan – see our Mazda 5 reservoir tank listing
- Mazda CX-30: Modern compact crossover – see our Mazda CX-30 front bumper cover listing
Subframe Cross Member Specifications
- Type: OEM used high-tensile steel subframe cross member for classic first-generation Mazda RX-7
- Function: Subframe cross member provides structural chassis connection at the cross-vehicle location. Structural steel component providing chassis rigidity, mounting points for various chassis components (suspension, engine mounts where integrated, and various other chassis mounting features), and structural integration with the vehicle body / chassis structure
- Construction: High-tensile steel construction – standard subframe material with structural integrity for chassis-mounted subframe applications. High-tensile steel provides the appropriate combination of strength and formability for structural chassis components. Cross member configuration with mounting points at both ends for chassis attachment
- First generation only compatibility: Critical – this listing is for first-generation RX-7 (SA/FB chassis 1979-1985) only. NOT compatible with second-generation FC RX-7 (1986-1991) or third-generation FD RX-7 (1993-1995) subframes. Each RX-7 generation used substantially different chassis architecture with different subframe configurations. Verify RX-7 generation before ordering
- Bare frame configuration: Subframe cross member ships as a bare frame per the source data. Bushings, mounts, and fasteners are reused from your existing installation or replaced separately as needed. Engine brackets and steering components are not included with the bare subframe cross member
- Common failure modes: Structural damage from collision impact, corrosion damage (particularly in salt-belt regions where road salt exposure over decades can accelerate structural corrosion on classic vehicles), mounting point damage or wear, various fatigue damage on classic vehicles with high service mileage. Symptoms include structural integrity concerns, mounting looseness, and various chassis alignment issues
- Testing: Structural integrity verified, mounting points inspected before shipment
- Classic vehicle disclosure: Classic vehicle chassis components commonly show cosmetic wear consistent with 40-45+ year old classic vehicle disclosure – surface rust, minor cosmetic corrosion, and various weathering consistent with vintage vehicle service history
Vehicle Compatibility
| Detail | Description |
|---|---|
| Mazda RX-7 first generation (SA/FB, 1979 to 1985) | Direct application, donor generation |
| Mazda RX-7 FC (1986 to 1991) | Different subframe, not interchangeable; call for availability |
| Mazda RX-7 FD (1993 to 1995 US) | Different subframe, not interchangeable; call for availability |
| Donor Reference | 1979 Mazda RX-7 |
Related Mazda Listings
- Mazda MX-3 Dashboard: Classic subcompact sport coupe – see our MX-3 dashboard listing
- Mazda MX-6 Center Console: Classic sport coupe (Ford Probe sibling) – see our MX-6 center console listing
- Mazda 3 Water Pump: Modern compact – see our Mazda 3 water pump listing
- Mazda 5 Reservoir Tank: Discontinued compact minivan – see our Mazda 5 reservoir tank listing
- Mazda CX-30 Front Bumper Cover: Modern compact crossover – see our CX-30 front bumper cover listing
Why Buy From Part Nests
- OEM verified high-tensile steel subframe cross member for classic first-generation Mazda RX-7
- Structural integrity verified, mounting points inspected
- Support for Mazda’s classic rotary-engined sport coupe with distinctive rotary heritage
- Free shipping to all 50 states
- 15 day replacement warranty on component defects
- Support team familiar with Mazda RX-7 generation differences and rotary heritage context
- Call (855) 634-4447 to confirm your RX-7 generation (first-gen SA/FB only), year, and configuration before ordering.
15 Day Replacement Warranty
Every used Mazda RX-7 Subframe Cross Member carries a 15 day replacement warranty starting on the delivery date. Generation matching is critical - this listing is for first-generation SA/FB (1979-1985) only. NOT compatible with FC or FD generations. Classic vehicle disclosure applies. Call (855) 634-4447 to start a warranty claim within 15 days of delivery.
What Is Covered
- Component defects present on arrival beyond what was disclosed
- Structural integrity failures within 15 days from installation
- Mounting point failures not disclosed at sale
- Incorrect part shipped due to an error on our end
What Is Not Covered
- Damage caused during installation
- Attempted installation on FC (1986-1991) or FD (1993-1995) RX-7 applications
- Cosmetic wear consistent with 40-45+ year old classic vehicle used part disclosure
- Labor expenses of any kind, including chassis alignment labor
- Part: OEM used high-tensile steel subframe cross member (bare frame)
- Application: Mazda RX-7 first generation SA/FB chassis 1979-1985 US market
- Segment: Classic Mazda rotary-engined sport coupe
- Rotary Engines: 12A (early SA22C) and 13B (later FB) Wankel rotary
- CRITICAL: First generation ONLY - NOT compatible with FC (1986-1991) or FD (1993-1995)
- Successor Generations: FC (1986-1991), FD (1993-1995 US) - different subframes
- Successor Nameplate: Mazda RX-8 (2003-2012 with Renesis rotary)
- Related Mazda: MX-3 dashboard, MX-6 console, Mazda 3, Mazda 5, CX-30
Additional information
| Brand | Mazda |
|---|---|
| Material | High-tensile steel |
| Wall Thickness | 3.2 mm (main support sections) |
| Engine Mount Integration | Supports factory engine bracket positioning |
| Sold As | Bare frame, bushings and mounts not included |
| Application | Mazda RX-7 first generation, reference donor 1979 |
| SKU | vaz648 |
| Price | $179.00 |
An OEM used high-tensile steel subframe cross member for classic first-generation Mazda RX-7 applications on the SA/FB chassis from 1979 through 1985 US market. High-tensile steel construction - standard subframe material with structural integrity for chassis-mounted subframe applications. Cross member configuration with mounting points at both ends for chassis attachment. Function is providing structural chassis connection at the cross-vehicle location with chassis rigidity and mounting points.
The Mazda RX-7 is Mazda's classic rotary-engined sport coupe representing Mazda's distinctive rotary engineering approach. First generation (SA/FB chassis) produced from 1979 through 1985 US market established the RX-7 nameplate and Mazda's rotary sport coupe positioning. SA22C is the early first-generation chassis code. FB is the later first-generation chassis designation. Same underlying first generation with progressive updates across the model years.
No. Critical - this listing is for first-generation RX-7 (SA/FB chassis 1979-1985) only. NOT compatible with second-generation FC RX-7 (1986-1991) or third-generation FD RX-7 (1993-1995) subframes. Each RX-7 generation used substantially different chassis architecture with different subframe configurations. Verify RX-7 generation before ordering. Call (855) 634-4447 for FC or FD subframe availability.
Early first-generation RX-7 used Mazda's 12A rotary engine (naturally aspirated Wankel rotary). Later first-generation RX-7 used the 13B rotary engine (larger displacement rotary variant). Distinctive Mazda rotary engineering with unique two-rotor Wankel configuration providing smooth power delivery in a compact engine package. Different from conventional piston engines - Mazda rotary is fundamentally different engineering approach.
Mazda is notable for its extensive commitment to rotary (Wankel) engine technology across multiple decades - unusual approach in the automotive industry where most manufacturers use conventional reciprocating piston engines. Mazda produced rotary engines across various vehicles including the RX-7, RX-8 (successor to the FD RX-7, produced 2003-2012 with Renesis rotary engine), and various other classic Mazda rotary vehicles.
First generation (SA/FB, 1979-1985 US) - this application. Second generation (FC, 1986-1991) - different chassis architecture, subframes NOT interchangeable. Third generation (FD, 1993-1995 US) - introduced twin-turbocharged 13B-REW rotary engine representing peak Mazda rotary engineering, subframes NOT interchangeable. Each RX-7 generation is a distinct chassis architecture.
Subframe cross member ships as a bare frame per the source data. Bushings, mounts, and fasteners are reused from your existing installation or replaced separately as needed. Engine brackets and steering components are not included with the bare subframe cross member. Plan appropriate replacement bushings, mounts, and fasteners at installation for optimal chassis integration.
Structural damage from collision impact. Corrosion damage (particularly in salt-belt regions where road salt exposure over decades can accelerate structural corrosion on classic vehicles). Mounting point damage or wear. Various fatigue damage on classic vehicles with high service mileage. Symptoms include structural integrity concerns, mounting looseness, and various chassis alignment issues. Classic vehicle chassis components commonly show cosmetic wear consistent with 40-45+ year old classic vehicle disclosure.
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