Genuine Mazda Differential Housing Breather / Vent • 0730-26-060

Genuine Mazda 0730-26-060 Differential Housing Breather / Vent

Replacement Genuine Mazda differential housing breather for Mazda MX-5 Mk1, Mk2, Mk2.5, Mk3, Mk3.5, Mk3.75 and Mk4 models, together with selected Mazda RX and AWD differential applications listed in the compatibility table.

The breather is fitted to the differential casing and allows internal air pressure to equalise as the differential oil and surrounding components heat up during operation and cool after the vehicle is stopped.

Without effective ventilation, pressure can build inside the differential housing and encourage oil to escape past the input-pinion or driveshaft oil seals. The breather also helps keep water, dirt and other contamination away from the differential interior.

The component is normally positioned at the upper area of the differential casing. There is typically one breather fitted per differential assembly. This listing supplies one Genuine Mazda differential breather.

The breather may require replacement if it is blocked, corroded, damaged, missing or contaminated with road debris. Possible signs of a ventilation problem include repeated differential oil leakage, oil mist around the casing, contamination around the breather or pressure being released when the differential is opened.

• Part type: Differential housing breather / pressure vent
• Primary use: Allows the differential casing to equalise internal pressure
• Location: Upper area of the differential housing
• Quantity per differential: 1
• Quantity supplied: 1 breather
• Brand: Genuine Mazda
• Part No.: 0730-26-060
• Also referenced as: 073026060 / 730-26-060
• Replaces: 0419-26-060 / 041926060
• Fitment note: Used across confirmed Mazda MX-5, RX and selected AWD differential assemblies

Fitment advice: This breather is used on multiple Mazda differential assemblies. Confirm that the original differential casing uses the matching breather arrangement, particularly where the vehicle has previously received a replacement, upgraded or non-original differential.

Other items to consider: When changing this part, inspect the differential input-pinion seal, driveshaft oil seals, casing joints, drain and filler plugs and the condition of the differential oil. Repeated oil leakage should be investigated rather than assuming the breather is the only cause.

Useful tools / consumables: Suitable pliers or removal tool depending on the installation, cleaning brush, lint-free cloths, brake cleaner, protective gloves and fresh manufacturer-specified differential oil if the casing is being serviced.

Difficulty guide: DIY Difficulty: Easy to Moderate. The breather itself is normally straightforward to replace, but access varies between vehicle generations. The differential casing should be cleaned thoroughly around the breather before removal so that dirt cannot fall into the opening.

Why Genuine Mazda? Genuine Mazda differential breathers are designed to match the original casing opening, retention arrangement and required ventilation characteristics. Correct fit and material specification help maintain pressure equalisation while limiting the entry of water and contamination.

What’s in the box: One Genuine Mazda differential housing breather / vent, part number 0730-26-060.

Installation notes: Clean the differential housing around the existing breather before removal. Remove the old component carefully without allowing debris to enter the casing. Install the replacement fully into its original mounting position and confirm that it is secure and unobstructed. Check the differential for existing oil leakage and verify the oil level before returning the vehicle to service.