2021 Kia Stonic Pricing and Specs

This is a really common type of question here at CarsGuide. It seems a lot of car-makers are using these speed warning systems and, in many cases, they’re more of an annoyance than a help.

In your Kia, speed sign recognition which is part of the adaptive cruise-control feature is the culprit. When the car’s cameras spot a speed sign, they compare that info with how fast the car is actually going (sometimes using co-ordinate information from the sat-nav as well). Sometimes, however, the sign detected relates to a side-street or roadworks on a side street, giving you a false alarm. Either way, not everybody likes this warning system.

There’s good news and bad news in the case of your car, Steve. The good news is that you can go into the menu system, select Driver Assistance, then Vehicle Settings, then Speed Alert, and you should find an Off setting that should disable the warning. The bad news is, you have to do this every time you start the car, because the default setting is On.

Perhaps the dealer can suggest a way of turning it off permanently since it appears as though a software update at your first service has enabled the system since you bought the car.

A shaking through the steering when you apply the brakes is often caused by brake rotors which have warped. Imagine spinning a bicycle wheel with a buckle in it. In a micro sense, that's what a warped brake rotor is doing. When that happens, they fight against the force of the brake calipers and that leads to the shaking you're feeling. You're right not to feel safe as the car is definitely not safe in this condition.

Sometimes the brake rotors can be machined to make them true again, but other times a replacement set of rotors is the fix. Don't forget to get your mechanic to change the brake pads when they fit the new rotors, as new rotors can be compromised by old pads.

This could be a coincidence whereby your maintenance was timed perfectly with something else going wrong. But if we assume that the new fuel filter is what has caused the no-start condition, then the first thing to check is that you've installed the filter in the correct orientation. Many filters only operate in one direction. Install it backwards, and the fuel may not flow at all, which would give you the symptoms you're now looking at.