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Old 07-18-2013, 01:32 PM   #1
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Motor Mounts- Lifespan

Hey guys,

So my car now has about 124k miles on it, and for a while I've been noticing when the car is started when cold, the idle can be very rough. It sounds like the hood is rattling, and I can feel vibration through the dash and steering wheel. Its been like this since I bought it with 44k miles, but I'm starting to think its getting worse.

The vibration occurs at low rpms and continues when I start driving out of my neighborhood(like under 1500 rpms).

I'm thinking its the motor mounts, because its worse in P and N than it is in D, but I can still very much feel it in D.

I also notice that when the car is warmed up, its not so bad anymore. It idles at a lower rpm when fully warmed up, maybe about ~700rpms. When its cold, I feel the vibrations between 900-1300rpms during a cold idle.


Does this sound like a motor mount problem?? How long should the factory mounts last?? I believe this car has 3 mounts, is there one that usually fails more than the other?? I looked at my passenger side mount, and I don't see any oil leaking or wetness in that area.

I took pics of the passenger side mount, I can't find the drivers side. It must be under the battery or something.

If not MM, what else can cause this??


Help a brother out


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Old 07-19-2013, 09:41 AM   #2
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I had my passenger side replaced at like 40K as it was damp yours looks like it all leaked out and isn't working correctly. They are hydraulically filled on these cars - call the dealer.
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Old 07-19-2013, 03:10 PM   #3
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I recently went through the same thing

The symptoms sound a lot like the same problems that I had before replacing all three motor mounts.

I purchased the following part numbers for my '08 automatic from Village Ford. I chose them because they are a supporting vendor that offers very competitive pricing for FF members that are registered with them (see the vendor section to see how to register with Village Ford):
  • 8S4Z7M121A HOUSING - TRANSMISSION EXTENSION
  • 5S4Z6038CB BRACKET - INSULATOR MOUNTING
  • 8S4Z6068A HOUSING

The motor mount in your pictures is the middle one and is the most expensive of the three. The casting on mine cracked which was the major cause of the vibration. The crack was probably the result of a minor fender bender that the car was involved in.

There is a mount that is located directly under the battery, and another one that is easily accessible from underneath the center of the car, it looks like a twisted dog bone.

All three mounts are fairly easy to replace with the help of a floor jack and block of wood pushing up from the bottom of the engine.

Hope that this helped,
-john
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Old 07-22-2013, 11:59 AM   #4
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Ok cool. Thanks for the part numbers
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Old 07-22-2013, 12:11 PM   #5
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You are welcome.

I would double check the numbers for your particular application, the numbers in my post above are for an '08 with an automatic transmission.

After I swapped them out, the car smoothed out like new, the hood stopped shaking, and the interior squeaks, rattles, and buzzes went away too. I was very happy.
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Old 07-26-2013, 07:59 PM   #6
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Just got my center mount replaced. Tech said it was completely compromised. Covered under 5YR/60K Powertrain warranty. Finally, the shaking is gone.
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Old 08-05-2013, 09:07 PM   #7
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Replace that mount and you will feel a world of difference. I have replaced them in every focus I have 06,08,09. All were around same mileage . It is a 20 min. job.
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Old 08-05-2013, 09:11 PM   #8
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Is the mount I have pictured the one that usually fails first or will it be best to replace all 3? I'm ready to do this soon because its getting worse and its starting to really bother me.
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Old 09-23-2013, 01:17 PM   #9
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As everyone else has been saying, it sounds very similar to my case before I replaced my motor mounts. I replaced them at right around 120k on my 08, because of the same issues. After they were replaced, those problems all disappeared, at 150k miles now, but I realized I waited too long to change them. They were due for a changing 20-30k before I actually did it after seeing the result.
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Old 09-24-2013, 12:23 PM   #10
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I have the rattling Going to bring it in closer to 50K for new motor mounts. Figure I might as well get them replaced as close to the end of warranty as possible.
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