Left brake light message keeps showing up on my dash. It was replaced. Is there a problem?

I have had my brake light on the left and right side of my Ml350 but I keep getting a notification on my dash "left brake light". Also, my radio shut off while I was driving. Could this be the beginning of a problem?

My car has 88275 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hi there. Check the brake lights on the vehicle and see if they are working. If the lights are working, then there could be a problem with the circuit for the brake lights or the brake light switch could have an issue. For the radio shutting off while driving down the road, there could be an issue with the harness that plugs into the radio. Remove the radio and check the pigtail that plugs into the the back. Make sure that there is a good connection. Check for any loose ground wires in the dash that connects up with the radio. If you need further assistance with your electrical issues, then seek out a professional, such as one from Your Mechanic, to help you.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

Find the reset button on the left side of your instrument cluster. Press the reset button and hold it until your display shows “To reset: Press reset button for 3 seconds.” Push the reset button again and hold it in until the display shows the system has been reset.
Start your vehicle, and while parked, turn the steering wheel as far as it can go to the right, then do the same but to the left. Repeat this process a few times, then turn off the vehicle. When you restart your vehicle, the light should be reset.
This simply means a sensor has detected your brake pads are too thin. This warning light should come on before the brake pads become a hazard so you have time to get them changed. You should replace them as soon as you can as if they wear out completely it could be very dangerous.
The brake light wiring system in most cars is not overly complex. At one end, you have the lights themselves: bulbs in sockets connected to a wiring harness. At the other end is the brake switch, where the pedal presses down and creates contact that completes the circuit. The system draws power from the car`s battery.
The first thing you can try, to turn off the car, then restart the engine. The second step is to disconnect your battery, wait for a few minutes then reconnect the battery. Another option is to continue to drive your car, and hope the light will reset itself.
Check the MAF sensor and clean it out with dry air. Then put it on and disconnect the battery for 12 minutes and hook it up. This will clear the computer to want to relearn itself. Then drive the vehicle and see what happens.
On all car models, the ESP G419 sensor unit is installed under the left seat.
The brake light on most vehicles is activated by a simple circuit involving only one or two components. Usually, the brake fluid level sensor and the parking brake are the only two items that can activate the brake light.
Typically, your brake system warning light being on means your parking brake is engaged, but if you`re still seeing the red (or orange) warning on your dash while the parking brake is disengaged, you will need to get your brakes inspected as soon as possible.
Blue – Service brakes. Red – Stop lamps (lights). Brown – Rear lamps (lights), clearance and side marker lamps (lights).
The first wire is the ground wire, which is typically black. The second wire is the power wire, which is typically red. The third wire is the brake light wire, which is typically white.
The blue wire is responsible for the brake system and reverse lights of the car – sometimes it can be used to control the reverse lights of a trailer using hydraulic brakes.
An electric braking system has several components, including a magnet, shaft, actuating arm, small front shoe, reactor spring, and larger rear shoe.
The three main types of brake-by-wire systems are: electronic parking brakes which found widespread acceptance due to ease of implementation; electro-hydraulic brakes (EHB) which are compatible with, and easy to implement alongside, legacy hydraulic brakes; and electro-mechanical brakes (EMB).
Pull up on the brake pedal and if the lights go out, switch mis-alignment or pedal position error is the likely cause. The final possibility is a wire shorted to power. Unplug the brake-light switch and if the lights stay on, a short circuit is the case. Finding such a shorted-circuit, is best left to a professional.
The easiest way to check for a brake line leak is by holding a flashlight under your car. If you notice drips on the inside of your wheels, rust spots along the lines, or any wet or dry fluid streaks, you could be dealing with a brake line leak.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

When I put my foot on the brake my back left brake light goes off, when I take it off the brake the brake light comes on
ANSWER : I would suggest trying to disconnect and reconnect the wiring to the rear lights. I have seen these older Toyota vehicles rear lighting short out on the lights themselves due to the way the light circuit was made on the lamp housing. Look at the housing circuit on the light to see if one is touching another, and that could tell you why it is malfunctioning. There could also be a problem with the brake light switch. If you are not comfortable dealing with wires, I recommend getting in touch with a certified mechanic who can look at your brake light issue for you to see what’s going on.

Left brake light message keeps showing up on my dash. It was replaced. Is there a problem?
ANSWER : Hi there. Check the brake lights on the vehicle and see if they are working. If the lights are working, then there could be a problem with the circuit for the brake lights or the brake light switch could have an issue. For the radio shutting off while driving down the road, there could be an issue with the harness that plugs into the radio. Remove the radio and check the pigtail that plugs into the the back. Make sure that there is a good connection. Check for any loose ground wires in the dash that connects up with the radio. If you need further assistance with your electrical issues, then seek out a professional, such as one from Your Mechanic, to help you.

EPC light on 2004 Jetta. Code said brake switch faulty, but brakes lights worked. Replaced brake switch, now no brake lights.
ANSWER : Hi there. The first thing that pops in my mind beyond of what you have listed is perhaps the electrical harness attached to the brake switch. Perhaps the harness itself is damaged or you have an exposed wire, loose ground wire somewhere. You might want to have a professional mobile mechanic come to your location and complete a brake lights not working inspection to help you diagnose this issue.

Brake lights are not working. replaced brake light swtch still no brake lights. the third brake light the connection was melted at
ANSWER : The first thing to do is to repair third brake light and replace the brake light fuse and then see if the third brake lights work and the lower lights start working? If only the 3rd brake light starts working then you may need a further checks on the turn signal flasher or switch could be bad.

I replaced the brake light switch. Gear lever unlocked because it had locked. Now the brakes feel hard.
ANSWER : Hi, thanks for writing in. You need to check the brake switch install adjustment. You may have the switch adjusted too tight and it is holding the the brake pedal partly down. This will cause the brake master cylinder to not release the brakes when you let off the pedal. Readjust the switch away from the pedal until you feel some free play again in the pedal. This should fix the problem. If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

First, the fuse 19 keeps blowing. When I hit the brake pedal my dash lights up. The third brake light acts like a running light.
ANSWER : Hi there. Check the wiring on the vehicle to the tail and brake lights. There is a cross short that is causing the lights to blow the fuses and make the tail lights brighter than normal. If you need further assistance with your electrical issues, then seek out a professional, such as one from Your Mechanic, to help you.

No dash lights, back right tail light is out, no parking lights. Brake lights work though as does head lights.
ANSWER : Hi there. In many cases, when you have electrical problems like you’re describing, it’s caused by multiple electrical component failure. It’s likely that a few electrical relays are not working; especially if you have systems that utilize the same components (such as your brake light and tail lights). I would recommend having a professional mobile mechanic come to your location to complete an electrical problems inspection first, so they can pinpoint what is damaged and recommend the right repairs.

Abs light, emergency brake light, steering wheel assist light, engine light, EPC light, traction control light
ANSWER : Hello, thank you for writing in. The vehicle does utilize a lot of the same sensors for these systems. Are there any other codes that are coming up when this code appears? If so you will want to take these into consideration when processing the repair and making a diagnosis. The module may be bad, and replacing it should fix the problem. The lights should turn off once the main computer recognizes the new module and the sensors sync up. If you believe the sensors need to be cleaned you may do so. Do as minimal as possible to make sure you are not damaging the sensor or disrupting the wiring inside. A bad connection would make the lights stay on. With so many lights that are effected by the module being illuminated, the module is likely bad or does not have a connection. Check the connection first and then resort to replacing the unit. For more help with these electrical tests, contact our service department.