A Guide to the Automatic Transmission Mount for the 2010-2021 Mazda 6
Experiencing clunks or vibrations in your Mazda 6? A failing transmission mount could be the culprit.
- Verify fitment for your generation: 2010-2013 and 2014-2021 models use different parts.
- Symptoms include clunking noises and new vibrations felt in the cabin.
- Aftermarket brands like Anchor and DEA are affordable, while Beck Arnley is a higher-quality alternative.
- While replacing the transmission mount, inspect the other engine mounts for wear.
Is Your Mazda 6 Shaking or Making Clunking Noises?
A worn-out automatic transmission mount is a common issue that can cause a range of noticeable problems. The rubber in the mount deteriorates over time from heat and stress, allowing the transmission to move more than it should. If you notice a new vibration in the cabin at idle or while driving, it's a primary symptom of a bad mount. You might also hear clunking, banging, or knocking sounds when you accelerate, brake, or shift gears. In some cases, a severely failed mount can even make gear shifting feel rough or jerky.
🎬 Watch this guide on identifying and fixing bad mount symptoms.Generation Differences are Key
The 2010-2021 year range covers two distinct Mazda 6 generations. The second generation (2010-2013) and the third generation (2014-2021) use different chassis and powertrain setups 🎬 See how to replace the mount on 2014-2020 Mazda 6 models., meaning their transmission mounts are not interchangeable. Always verify the part fits your specific year before ordering.
Choosing the Right Aftermarket Mount
When replacing the transmission mount, you have a choice between OEM (Original Equipment Manufacturer) and aftermarket parts. While OEM parts guarantee a perfect fit, quality aftermarket brands can offer good performance for a lower price. Based on owner feedback and mechanic reviews, aftermarket mounts can sometimes be stiffer than OEM, which might introduce slightly more vibration into the cabin. However, for many drivers, the cost savings are worth it.
Aftermarket Brand Tiers for Mazda 6
- Tier 1 - Good Quality: Beck Arnley is often considered a higher-quality aftermarket brand that sources parts to match OEM specifications. If you want a part that is close to original quality without the dealer price, this is a strong option.
- Tier 2 - Standard/Value: Brands like Anchor, Westar, and DEA are widely available and very affordable. They are a practical choice for budget-conscious repairs. While generally reliable, some users report these brands may not last as long as OEM or premium aftermarket options and can sometimes have minor fitment issues.
- Tier 3 - Economy: Pioneer Cable offers some of the lowest-priced options available. These are best for situations where keeping the initial repair cost to a minimum is the highest priority.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $170 - $250+ |
| New Aftermarket | $71 - $129 |
| Shop Labor | $140 - $205 |
Pro Tip: Inspect Your Engine Mounts Too
The engine and transmission mounts work together to secure the powertrain. When one mount fails, it puts extra stress on the others. It is common for other mounts, especially the rear "dogbone" mount or the passenger-side engine mount, to fail around the same time. While you are replacing the transmission mount, it's a good idea to inspect all of them for cracks or excessive movement.
Frequently Asked Questions
Are there any recalls for the Mazda 6 transmission mount?
No, there are no specific recalls for the transmission mount itself. However, there was a safety recall (NHTSA #19V-323) for 2009-2013 Mazda 6 vehicles concerning corrosion on the front cross member in salt-belt states, which is a related chassis component that supports the suspension. There are no widespread TSBs (Technical Service Bulletins) directly addressing premature failure of the transmission mount.
Can I replace the Mazda 6 transmission mount myself?
Yes, this is a feasible DIY project for someone with moderate mechanical skill. The process involves supporting the transmission with a floor jack, removing the battery and airbox to gain access, and then unbolting the old mount and bracket to install the new one. You will need a good socket set, a torque wrench, and jack stands.
🎬 Follow this step-by-step replacement tutorial for older Mazda 6 generations.How can I tell for sure if my transmission mount is bad?
A visual inspection is the best way. Look for cracks, tears, or collapsed rubber in the mount. You can also open the hood, have a helper put the car in drive with the brakes held firmly, and lightly apply the throttle. If you see the engine and transmission assembly lurch or move excessively, the mount is likely worn out.
Will a bad transmission mount cause a Check Engine Light?
It is unlikely to directly cause a Check Engine Light. However, in very severe cases, the excessive vibration could potentially be detected by sensitive engine sensors, or the movement could damage other components like wiring or seals, which could then trigger a light.
Helpful Videos
Technical Specifications
OEM Part Numbers: K123-39-070A (2018-2021) BBM5-39-070C (2011-2013 SkyActiv) GS3L-39-070 (V6, 2009-2013) GSH6-39-070 (I4, 2009-2013)
The mount consists of a steel or aluminum bracket with a bonded rubber or liquid-filled bushing to absorb vibration. The specific design varies significantly between the 2nd Gen (2010-13) and 3rd Gen (2014-21) Mazda 6.
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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 6: