Mazda Miata NA/NB Rear Main Seal Installer Tool – MX-5 BP Engine Seal Driver – Made in USA

Install your Miata rear main (crankshaft) seal correctly the first time with this precision installer tool designed for NA (1990–1997) and NB (1999–2005) Mazda MX-5 Miata. This tool ensures the seal is driven in straight and to proper depth, helping prevent leaks and uneven wear.

Purpose-built for BP-series engines, this installer centers the seal and applies even pressure during installation for consistent, OEM-style results.

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Key Features

• Designed for Mazda Miata NA/NB (1990–2005)
• Ensures straight, even rear main seal installation
• Helps achieve correct seating depth
• Prevents seal damage and leaks during install
• Durable PLA+ construction for stiffness and reliability
• Easy to use with mallet or even-pressure method
• Made in the USA

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Compatibility

Chassis:

• Mazda Miata NA (1990–1997)
• Mazda Miata NB (1999–2005)
• Includes Mazdaspeed Miata (2004–2005)

Engines:

• 1.6L B6-ZE
• 1.8L BP-ZE / BP-4W / BP-Z3 (VVT)

Not compatible with:

• NC (2006–2015)
• ND (2016+)

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What’s Included

• 1 × Rear Main Seal Installer Tool
• Quick start instructions

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How to Use

1. Remove the old seal and clean the bore/retainer
2. Lightly oil the new seal lip
3. Position the seal and place the tool over it
4. Tap evenly with a rubber mallet (or apply even pressure with bolts)
5. Drive until fully seated, then inspect

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Notes

• Color may vary from photos
• 3D printed specialty tool — minor layer lines are normal
• Designed for installation use only
• Avoid exposure to high heat or harsh solvents

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Why Use a Seal Installer Tool

Improper installation can lead to leaks, uneven wear, or premature failure. This tool helps ensure proper alignment and depth, giving you a reliable seal and professional-quality results.