Hi, I have a 2008 Mazda CX-7 and it intermittently won't start or crank. Even with a boost, or with the physical key.

SOURCE: mazda cx-7 2008 left headlight stopped working,

check the wiring from the headlight. You want to find the ground wire which is usually a black wire thats secured to some metal part of the car. Basically just check that all your wires are in tact and tightly secured. A bad ground is a very common electrical problem.

SOURCE: On a 2008 Mazda CX-7 Where is the Oil filter

Unless the CX-7 is different from all other cars I've driven, the filter is a cylindrical painted metal can, about 3 or 4 inches in diameter and 3 to 6 inches long. It can any color, depends on the brand. Go to an auto parts store and ask them for one for your vehicle, and look at it. Different vehicles take different sizes.
It is almost always located on the side of the engine block, between the oil pan on the bottom and the cylinder heads on the top. (You generally have to put the car up on ramps to reach it from the bottom, but I assume you are changing the oil, so you have to get under it to remove the oil drain plug as well.)
When you remove it, be careful for oil that may leak out of it as you are unscrewing it.

Reynaldo Andico

• 2431 Answers
• Posted on Mar 10, 2012

SOURCE: Why won't my 2008 Chrysler Aspen start?

You have 2 issue going on. Its not seeing a valid key,and it is starting with the remote.Your remote entry key did it happen to get wet? Or moisture get in? Lock the vehicle up using the key. enter the vehicle using the key fob.After the vehicle unlocks you have 60 seconds to enter the vehicle insert the key in the ignition start it up.Your remote start up is out of step.

SOURCE: my 2008 mazda 6 intermittenly won't crank, power window work and radio works, after it sits awhile it starts...is there any type of diagnostic to perform on this type of issue

first thing to do is get the car not to crank and check for power to the starter. if the starter has battery power and signal from the ignition switch then the problem is the starter. second thing is to check the plug at the trans range switch. the connector may be loose since you just had the trans repaired. ground may be an issue but not likely since the dash lights and other things work. GOOD LUCK.

SOURCE: How to program smart key for Cx-9

hloo ihave benz smrt forfour at home showing key i dash brod pls can some body help me