Lately, my Mazda 6 2003 hasnt been able to catch speed with me pushing the peddle.. i would have to let the car catch speed on its.. adventually with driving it the (AT) Transaxel ligh came on...Is th

SOURCE: 2003 mazda protege 5 transmission problem

It sounds as if you may have a short in the wire harness, or a bad plug on one of the sensors. This is common. Make sure the sensor connections are clean then use die-electric grease on them where they make contact.

SOURCE: 2002 Mazda Protege 5: I

I would check the sway bar linkages, they are usually the first to go, and they are only $40. Its an easy 'do it yourself' project, remove the old one with torches or a grinder (with a small cutting wheel). You can also use a vise grip and sockets but it takes longer.

You can't tell these are damaged until you remove the part. I change mine every 100 000km or so.

SOURCE: Grinding noise in front end

Hi
Had the exact same problem, on a used 2003 Protege ES with 82,000 miles that I purchased.
Started with the loud "road noise" I thought well maybe thats just the sound that it makes.
And then noticed that it varies when turning.
This will continue to get worse and then your abs light will come on when it gets bad enough to trigger the sensor..
It turned out to be a bad wheel bearing.
Take it to a shop and have an experienced mechanic check it out. Its repairable.

SOURCE: Front wheel noise

Does this knocking noise mostly happen when you are turning the car? If so this is caused by a worn CV joint. It's not an expensive fix, but I would rather go to a mechanic than attempt it without prior knowledge of how to repair this. I hope this helps.

SOURCE: Mazda 626 - Hard to shift into gear.

With any vehicle that has a hydraulic clutch, a worn master cylinder or slave cylinder will give this very symptom. First step is to check the fluid in the resivor. If it is low, you will want to check for fluid bypassing the seals. Be sure to check under the rubber dust cover as fluid can collect there and not be readily visible. Also, if the fluid in the resivor is dark colored, it is an indication of the internal seals going bad and you will need to replace the cylinders.