A Guide to Engine Mounts for the 2015-2023 Mazda 3 Sport
Feeling a harsh vibration in your Mazda 3 at idle? Your passenger-side engine mount is the most likely culprit.
- The passenger-side hydraulic engine mount is the most common failure point, causing vibration at idle.
- For best results and to avoid vibration, use an OEM replacement mount; budget aftermarket brands often cause more vibration than they solve.
- Replacing the passenger-side mount is a straightforward DIY job that requires supporting the engine with a jack.
- A TSB was issued for 2014-2015 models for this exact issue, confirming it's a known problem.
The Common Failure Point: Your Passenger-Side Mount
If you own a 2015-2018 Mazda 3, you should pay close attention to your passenger-side engine mount. This part is a known weak point. In fact, Mazda issued a Technical Service Bulletin (TSB 01-012-16) for 2014-2015 models that experienced rattling and vibration at idle because the original mount would fail. The failure happens when the rubber housing cracks and the hydraulic fluid inside leaks out, leaving you with no vibration damping. While the TSB specifically covered early models, this failure is common across the entire 2015-2018 generation and has also been reported by owners of 2019 and newer models.
OEM vs. Aftermarket: An Honest Look
When replacing a failed mount, you have a choice between Original Equipment Manufacturer (OEM) and aftermarket parts. For this specific part on your Mazda 3, the choice has a big impact on ride quality.
- OEM Mounts: These are the most expensive option but are strongly recommended if you want to maintain the car's original smooth feel. They are properly designed with hydraulic fluid to absorb vibrations. While the original part is known to fail, the replacement from Mazda is a modified, improved design.
- Aftermarket Mounts: Budget-friendly brands like Anchor and DEA are widely available but generally not recommended by Mazda owners. Many of these are just solid blocks of rubber without the crucial hydraulic fluid chamber. Installing one often results in trading one problem (clunking) for another (constant, harsh vibration). Many owners who choose cheap aftermarket mounts report having to do the job a second time with an OEM part.
Pro Tip: What About Performance Mounts?
You may see polyurethane mounts from brands like Corksport or Damond. These are for performance applications. They are very stiff and will dramatically increase cabin noise and vibration, which is not ideal for a comfortable daily driver.
Choosing the Right Aftermarket Part
If you must use an aftermarket part due to budget, understand the trade-offs. You will likely experience more cabin vibration than you would with an OEM part. When one mount fails, the others are placed under extra stress. 🎬 See how failing mounts can cause hidden damage to your car. It is wise to inspect the other two mounts (transmission and rear) when replacing the passenger-side one.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Passenger-Side Mount | $180 - $250 |
| New Aftermarket Passenger-Side Mount | $83 - $179 |
| Shop Labor (Passenger-Side Mount) | $150 - $250 |
| Total Professional Replacement (OEM Part) | $330 - $500 |
| Total Professional Replacement (Aftermarket Part) | $233 - $429 |
Frequently Asked Questions
How many engine mounts does my Mazda 3 have?
Your car has three main mounts: the passenger-side engine mount, the driver-side transmission mount, and the rear lower engine mount (torque strut).
Can I replace just the one broken mount?
Yes, you can replace only the failed mount. However, a failed mount puts extra stress on the remaining good ones, which can cause them to fail sooner. It's best to inspect all three and replace any that show signs of wear, cracking, or leaking.
Is it hard to replace the engine mount myself?
The passenger-side mount is a very manageable DIY job for someone 🎬 Watch: A quick walkthrough for replacing the passenger-side motor mount. with basic tools. It involves supporting the engine with a jack and a piece of wood, removing a few bolts, and swapping the part. The rear mount is even easier. 🎬 Watch this step-by-step guide to replacing your Mazda 3 mounts. The driver-side transmission mount is the most difficult, as it requires removing the battery and airbox for access.
Are there any recalls for the engine mounts?
No, there are no safety recalls for engine mounts on the 2015-2023 Mazda 3. There was a Technical Service Bulletin (TSB) for early models, which is a repair guide for dealers, but not a recall.
Helpful Videos
Technical Specifications
OEM Part Numbers: GHY0-39-060 GHY1-39-060
The key component is the passenger-side (No. 3) hydraulic engine mount. The vehicle also uses a driver-side transmission mount and a rear lower torque strut mount.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Mazda 3 Sport: