Description
Product Overview
The Mazda Crankcase Washer (model L3K9-12-429) is a flat, machined steel component finished in a durable silver coating. Engineered as an exact replacement for the original equipment, it offers the same tolerance and surface finish as the factory part. Weighing only 0.01 ounces and packaged in a compact 4.45 x 3.27 x 1.14‑inch box, this washer is lightweight yet robust, ensuring reliable sealing of the engine thrust area. Its design eliminates the risk of misalignment and provides consistent pressure distribution across the crankcase.
Usage
This washer is intended for use during engine rebuilds, routine maintenance, or when replacing a worn thrust washer on Mazda models that require the L3K9-12-429 part. It fits perfectly in the crankcase assembly, supporting the crankshaft and preventing axial movement. Ideal for professional mechanics and DIY enthusiasts who demand OEM quality, the washer performs well in high‑temperature environments and under the stresses of normal engine operation.

Why Choose Us
Choosing this genuine Mazda crankcase washer guarantees an exact fit, eliminating the guesswork associated with aftermarket alternatives. Our parts are sourced directly from the manufacturer, ensuring compliance with Mazda’s strict quality standards. Each washer undergoes rigorous inspection for dimensional accuracy, material integrity, and surface finish. With a 4.2‑star rating from 54 verified customers, you can trust its performance and longevity.
Key Features
- Exact OEM specification for flawless installation
- Flat machined design provides optimal sealing and load distribution
- Silver machined finish resists corrosion and wear
- Lightweight yet strong construction for reliable engine performance
- Compatible with Mazda models requiring part number L3K9-12-429
FAQ
Is this washer compatible with all Mazda engines?
The washer is designed for Mazda models that specify part number L3K9-12-429. Consult your vehicle’s service manual to confirm compatibility.
Can I install this washer myself?
Yes, if you have basic mechanical skills and the proper tools. Follow the service manual’s torque specifications for a secure fit.
What is the difference between this OEM part and aftermarket alternatives?
OEM parts match the original material, dimensions, and finish, ensuring reliability and longevity, whereas aftermarket parts may vary in quality and fit.
Does the washer come with any warranty?
Yes, it includes a limited manufacturer warranty covering defects in material and workmanship.
How do I verify the authenticity of the part?
Check the packaging for the Mazda logo, part number L3K9-12-429, and the OEM certification label included with the product.





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