If your emergency brake isn't working correctly, the problem likely lies in one of these areas:
* Worn brake pads: This is the most common cause. Worn rear pads mean less braking surface, and therefore less effectiveness from the parking brake. This requires replacing the rear brake pads.
* Low brake fluid: Low fluid level affects the entire braking system, including the emergency brake. Check your brake fluid reservoir and top it off if needed. Never just add fluid without determining the cause of the low level first. A leak should be addressed.
* Internal brake components: There could be a problem with the internal mechanisms of the rear calipers or the parking brake mechanism itself. This usually requires professional diagnosis and repair. This could involve replacing parts within the caliper or even the caliper itself.
* Cable issues (though less likely): While primarily hydraulic, there might be a very short cable involved. If there's an issue here, it would likely manifest as a binding or sticking issue, requiring inspection and potential replacement.
* Contamination: Dirt or other debris in the braking system can affect performance.
What to do if your emergency brake isn't working:
1. Check your owner's manual: See if it provides any specific troubleshooting or diagnostic information.
2. Check the brake fluid level: Low fluid suggests a leak somewhere in the braking system, requiring professional attention.
3. Inspect the rear brake pads: If you're mechanically inclined, you can check the thickness of your rear brake pads. If they are worn, they need to be replaced. This is not a job for a beginner, however, and should be left to a qualified mechanic if you lack experience.
4. Have it professionally inspected: If you can't identify the problem yourself or are uncomfortable working on your brakes, take your vehicle to a qualified mechanic for diagnosis and repair. Brakes are a safety-critical system, and it's best to have a professional address any issues.
Do not attempt to adjust the parking brake yourself unless you are experienced with automotive braking systems. Improper adjustment can lead to unsafe braking performance.
