1990–1993 Mazda Miata 1.6L B6-ZE Engine with SB0319090 Automatic Transmission – JDM Motor For Sale at J-Spec Auto Sports

If your NA Miata needs a dependable replacement drivetrain, J-Spec Auto Sports offers a JDM Mazda Miata 1.6L B6-ZE engine paired with the automatic transmission (SB0319090). This complete engine and transmission package is imported from Japan and provides an excellent solution for restoring the performance and reliability of early Mazda Miata models.

The B6-ZE engine is the original high-revving 1.6L DOHC motor that helped establish the Miata as one of the most beloved sports cars ever built. Known for its lightweight design, responsive power delivery, and durability, the B6-ZE remains a popular engine among Miata enthusiasts.

Purchasing the engine together with the automatic transmission ensures proper compatibility and simplifies installation.

Engine & Transmission Specifications

• Engine Code: B6-ZE

• Displacement: 1.6L Inline 4 Cylinder

• Configuration: DOHC 16-Valve

• Fuel System: Electronic Fuel Injection

• Aspiration: Naturally Aspirated

• Transmission: Automatic

• Transmission Code: SB0319090

• Drivetrain: Rear-Wheel Drive (RWD)

• Condition: Used JDM Engine – Inspected

The B6-ZE engine is widely known for its reliability, smooth revving capability, and balanced performance.

Compatible Vehicles

Direct replacement for:

• 1990 Mazda Miata 1.6L

• 1991 Mazda Miata 1.6L

• 1992 Mazda Miata 1.6L

• 1993 Mazda Miata 1.6L

Chassis Code:

• NA Miata (NA6)

Always verify compatibility with your vehicle before installation.

What’s Included

This drivetrain package typically includes:

• B6-ZE 1.6L engine long block

• Automatic transmission (SB0319090)

• Intake manifold

• Fuel rail

• Sensors and accessories (may vary depending on stock unit)

Exact accessories may vary depending on the engine currently in inventory.

Why the Mazda B6-ZE Engine Is So Popular

The B6-ZE engine became legendary for its role in the first generation Miata.

Key advantages include:

✔ Lightweight design ideal for sports cars
✔ Smooth high-revving performance
✔ Reliable Mazda engineering
✔ Excellent parts availability
✔ Strong enthusiast support

For owners restoring early Miatas, the B6-ZE remains the correct factory replacement motor.

Ideal For

This engine and transmission package is perfect for:

• Blown Miata engine replacement

• High mileage Miata rebuilds

• Automatic transmission replacement

• NA Miata restoration projects

• Budget sports car rebuilds

Replacing the engine and transmission together helps ensure proper drivetrain compatibility and simplifies installation.

Why Buy From J-Spec Auto Sports?

J-Spec Auto Sports specializes in importing JDM engines, transmissions, and performance drivetrains from Japan.

Our inventory regularly includes:

• Mazda Miata engines

• Subaru WRX & STI turbo engines

• Toyota performance engines

• Mitsubishi turbo drivetrains

• Rare JDM components

Every engine and transmission assembly is inspected before shipment to ensure quality and reliability.

Shipping Information

All engines and drivetrain packages are securely palletized and shipped via freight carriers throughout the United States.

Local pickup may also be available.

Contact J-Spec Auto Sports for availability and shipping quotes.