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.Google+
Car Problem Reports
Mazda Mazda5 Defective Engine Mount May Cause Excessive Vibration/Noise
Mazda Mazda5 Problem
Average Mileage: 84,020 mi (38,000 mi - 140,000 mi)
Visitor, 2006 Mazda Mazda5, 100,025 mi
06 mazda5 vibrating at 45kmph. Shop said over $800 to replace engine mounts 3 and 4.
PS I'm Canadian. Wish I could enter a postal code.
Visitor, 2006 Mazda Mazda5, 90,000 mi
replaced upper passenger side engine mount myself with aftermarket of same crappy quality.
Need to replace again. it's shot. Need to find if there is a redesigned one that wont fail.
Visitor, 2006 Mazda Mazda5
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 Mazda5, 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 Mazda5, 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.
I just had to have a broken motor mount changed yesterday. I see that some people are being told it will cost $800 or more. I personally would look around. The part I purchased was $156. I had multiple maintenance items taken care of at the same time, including brakes and I paid less than $500 for everything. Just beware of how much in total labor a garage is charging you. I am fortunate enough to have found a small locally owned garage that is honest and does good work. It might be worth shopping around and trying to find a shop that is not a dealer or chain.
Visitor, 2007 Mazda Mazda5, 110,000 mi
car shakes excessively when idling. have not fixed it yet.
Visitor, 2007 Mazda Mazda5, 140,000 mi
MY 2007 MAZDA 3 SPORT, HAS ALOT OF VIBRATING GOING ON IN THE ENGINE.
Visitor, 2007 Mazda Mazda5, 38,000 mi
Engine mounts shot cost 1400 dollars to replace.... no recall.. now gone again..
Visitor, 2010 Mazda Mazda5, 83,001 mi
Was told the Upper Right Motor Mount needs to be replaced due to leakage