On some models, excessive engine vibration or knocking noises heard while the engine is idling, being started or switched off are usually caused by a defective engine mount at the top right side of the engine. A redesigned engine mount is available to alleviate this problem.
Car Problem Reports
Mazda Mazda5 Defective Engine Mount May Cause Excessive Vibration/Noise
Mazda Mazda5 Problem
Average Mileage: 82,456 mi (40,000 mi - 125,000 mi)
Visitor, 2006 Mazda 5, 91,000 mi
Our 2006 Mazda 5 normally runs very quietly but suddenly began making loud engine buzzing/vibration noises when at idle or low speeds. Higher speeds resulted in less noise but the noise/vibration was still there. I first suspected an exhaust leak but within a day or two the noise/vibration grew to be too much to be just an exhaust leak. I took it into a shop I trust and was told a motor mount was broken. The shop recommended I replace all three mounts at once at a cost of $840 (including labor and their "diagnostic" work).
My wife's 2004 Mazda 6 (also with the same 2.3l 4-cyl engine as my 2006 Mazda 5) began exhibiting the same noise, (though much less noisy) the week prior.
Visitor, 2007 Mazda 5, 40,000 mi
When I took my 2007 Mazda 5 in for another problem, they told me my engine mount had been replaced under warrentee. Car was quieter and handeled better after that.
Visitor, 2009 Mazda 5, 49,000 mi
I have fluid leaking from the engine mount of my 2009 Mazda5. I have never seen an engine mount leak fluid. This sucks royally!
Visitor, 2006 Mazda 5, 125,000 mi
I replaced engine mounts May 2011. I just had the car oil change and inspection. They said the engine mounts need replacing again and warranty is only a eighteen months on previous part. I was out of luck at 20 months.
Visitor, 2007 Mazda 5, 116,000 mi
On third set of motor mounts...
Visitor, 2006 Mazda 5, 78,567 mi
Load starting vibration and noise. I removed to airbox to conirm the distruction of the drivers side upper mount. replacement from Bountiful Mazda. Mount 125$ labor 75$ not too bad.
Visitor, 2007 Mazda 5, 76,000 mi
My steering wheel shakes when it gets between 55 and 65 miles, then even outs. Then does it again when I break. I was told I have a bad front motor mount so I hope this fixes it.
Visitor, 2006 Mazda 5, 120,000 mi
Same issue. Mechanic told me this is very common with this model (m5).
Visitor, 2006 Mazda 5
Dang, again, just seeing this site for the first time... but, it seems like my Mazda 5 is having all the same issues. Had to have my motor mounts replaced.
Visitor, 2006 Mazda 5, 75,000 mi
I had this same problem. I had to have a mechanic replace all 3 engine mounts, though I did drive the car like it was an off road vehicle.