So, my CX7 is playing up again!
I bought the car brand new in 2007 and since then despite regular 4000 mile oil changes with full synthetic and following the recommended service guide, it has gone through 3 turbos and a brand new factory engine, A/C compressor and transfer case. (All covered under warranty)
Last week, we noticed a knocking sound at 3K RPM but it disappeared very quickly as you accelerated. I guessed it was a heat shield or cover vibrating as it was not possible to replicate just by revving the engine.
Today the check engine light came on and the knocking got significantly louder and is now throughout the rev range. If you let off the throttle or accelerate very slowly, it does not knock consistently but under power it sounds like a can with a couple of large ball bearings in it being shaken!
I took it to the dealer who didn't have time to look at it, the service guy who writes up the jobs thought it may be either a low end rod knock, the VVT failing or maybe a valve issue.
The car makes power and sounds perfect at idle.
They suggested I authorize 1/2 a days labor and they would try to figure it out but said Mazda would likely not cover all of the bill if any at all.
To add insult to injury, I went to see the sales guy for a price to trade it in against a new CX5 GT, the reply, $4 to $5K IF it had no issues but as is, "about "$2K" I paid $27K for it new so $4K equals $23K depreciation in 6 years, that's pretty poor considering I just sold a basic Ford Focus with 123K miles for $2700!
Fuck that, I took it to a local a local mechanic and asked him to investigate....
I see a new vehicle in my future once the CX7 is repaired but after all the issues I have had, I doubt I will ever consider another Mazda.
"Zoom Zoom" more like "Clunk Clunk"