hey when going at around 140 km/hr or 87.5 miles/hr the car, especially the steering wheel vibrates quite a bit. Is this the road or is this normal?

 

There are many possibilities.

1. Tire balance incorrectly
2. Suspension problem like lower control arm (did your wheels hit anything hard ?)
3. Alignment problem

Hope it helps

Disco_p5

 

A month or so ago, I hit a curb pretty hard (stupid ice) and I bent one of my steel rims pretty good. After I hit it, my steering wheel shook bad at 30 km/h and got much worse at 50 km/h. I immediately took it in. Turned out to be a bent rim and way out of alignment.

I've been up to and past 140 km/h many times...my steering is rock solid. Does your steering start to shake only as soon as you hit that speed? Have you tried going that fast on different roads?

I'd do as the previous post says and get the alignment, rims, and road issue checked out...starting with the road because that's free to you.

 

I also did the same thing on my previous car- bent the rim so badly that the steering shook at all speeds!

But this car is a month old. The steering doesn't really shake, but I feel vibrations at speeds greater than 130km/hr. Like holding a lawnmower, but not as intense. It doesn't bother me that much since I take short trips but I imagine if I took a road trip it would make my hands sore.

2K km more till my first oil change. I'll wait till then to ask about it. In the meantime I'll try some different highways.

 

i had snow on my rims and going 90 it shook bad, when i brushed it off it was okay again, also you wheels have to be perfectly balanced or you will feel vibrations, i feel really really bad vibrations on the wheel in my rav4 because they haven't been aligned or balanced for a while so i guess i gotta take it in sometime

 

If your car is only a month old and you didn't hit anything ever since you bought it I suspect it to be tire balancing problem, sometimes those stupid weights they stamped on the wheels will fly off if speed is high. If any of those weights is off then you will feel the vibration. You can only feel it above 130-140 km/hr is probably because the one that flew off is only a small one. But I am only making an assumption here. You should better check the suspension as well.

Oh also check your lug nuts, sometimes those stupid things might be loosen, haha I don't think you wanna end up seeing your wheel fly off 50 meters from your car

Disco_P5

 

I'll have it aligned right away. After the dealer changed my struts they didn't re-align. A few weeks later, I found all my tires were bald in the inside and have to replace all four immediately and it cost me some good $.

 

It happens to me when I have my 17 rims on

After i change it back to stock rims

it's fine for me

 

UPDATE:

tested car on new / smooth highway (hwy 400 north of 401). I definately feel some vibrations/rumbling above 130km/h. The weirdest thing I feel is the steering wheel feels like it wants to turn a bit itself when aiming/driving straight, sort of like driving on subway tracks. This sounds like alignment?

I hope this is covered on the warranty.

 

Other than what's been mentioned here, possible causes for the vibration include a flatspotted tire (from locking the brakes), or an otherwise damaged/defective tire- check the sidewalls and tread for unusual bulges. Another less likely cause is a damaged hub or axle, but you have to hit something HARD to cause this- in my experience, such an incident will usually *destroy* the wheel first. Poor wheel alignment does not explain the vibration (this is a commonly held misconception) but may explain why the car pulls to one side.

BTW Protege5, the most likely cause of your 17's vibration is that they're not hubcentric. Mazdas tend to be very sensitive to non-hubcentric wheels. Did your tire dealer and sell you some hub rings?

 

Trouble with most of our highways in Canada is that they are crowned so that water runs off easier. Basically that means that they are slightly angled towards the edges and it will feel like the car is pulling to one side.

An easy, but not really scientific, way to check your alignment , is to find a big-*** empty parking lot and drive straight in there and see if it pulls to one side.

In regards to thes vibrations/rumblings, does it feel like the car would turn if you took your hands off the wheel? Sounds odd to me and I'd get it checked out.

 

Canadian highways suck major ***, compared to US interstates. Guess it has to do with the harsh winters and all that freakin salt we use up here.

 

What's worse than the salt is the frickin' gravel that gets poured over the highways. I have so many chips in my hood and window it's incredible. My windshield looks about 5 years old already

 

UPDATE:

I brought my car to the dealer and they did detect a tire imbalance and they said they fixed it. I even saw the guy take the tires off and bring it somewhere else. Though I still vibrates a bit at above 120 Km/h. Maybe this is normal? Yet my old sunfire was quite smooth at 150-160 Km/hr.

I didn't bang hard into anything. What should I do?

 

I say take it back and tell them it's still not right. It's NOT normal (IMO).