Owning a BMW is a dream come true for many car enthusiasts. The combination of luxury, performance, and cutting-edge technology is hard to match. One of the standout features that many BMW owners treasure is the remote start function. It allows drivers to warm up their cars during chilly winters or cool them down in sweltering summers before stepping inside. However, like any technology, the remote start feature may occasionally encounter issues. If you find yourself in a situation where your BMW remote start is not working, this article will provide a comprehensive guide to diagnosing and resolving the problem.
Understanding the Remote Start Feature in BMWs
The remote start feature in BMWs is part of a sophisticated keyless entry and ignition system designed to enhance convenience and comfort. With the press of a button, you can start your vehicle from a distance, allowing it to reach your desired temperature before you enter.
How BMW Remote Start Works
The remote start operates via a signal sent from your key fob to the vehicle, activating the engine without needing a physical key. This seamless functionality is typically powered by the following components:
- Key Fob: The primary device that sends the start signal.
- Receiver Unit: The part of your BMW that picks up the signal from the key fob.
- Engine Control Module (ECM): The engine’s computer that responds to the start command.
- Security System: Ensures that the remote start command is legitimate and that the vehicle isn’t being tampered with.
Understanding these components can significantly aid in diagnosing the issue when your remote start is not functioning.
Common Reasons for BMW Remote Start Failures
Several factors can impact the functionality of the remote start feature. Here’s a detailed rundown of the most frequent issues that BMW owners may encounter:
1. Low Battery in the Key Fob
The most common reason your remote start may not be working is a weak or dead battery in your key fob. If the battery is low, it won’t transmit a strong enough signal to your vehicle.
How to Check and Replace the Key Fob Battery
To check if the key fob battery is the issue, first ensure that the other functions of the fob (like locking and unlocking the doors) are also not responding well. If they are sluggish, it’s time to replace the battery:
- Open the key fob carefully using a small flathead screwdriver.
- Remove the old battery and replace it with a new one (ensure it’s the correct type).
- Reassemble the key fob and test the remote start feature.
2. Vehicle Not in ‘Ready’ Mode
BMWs have specific conditions that must be met before the remote start function can activate. If your vehicle isn’t in the correct mode, the remote start won’t work.
Check These Conditions:
- Ensure the gear shift is in ‘Park.’
- The hood and doors must be closed securely.
- There should be no issues detected by the car’s onboard diagnostics system.
3. Faulty Receiver or ECM
If components like the receiver unit or ECM malfunction, your vehicle may not recognize the start command from the key fob. This is less common but can happen due to electrical problems or physical damage.
4. Security System Interventions
BMWs come equipped with advanced security features. If the system believes there is an attempted theft or unauthorized use, it may lock out the remote start feature.
Steps to Diagnose the Problem
If you’ve ruled out a dead battery in the key fob and checked that the vehicle is in the right condition for remote start, it’s time to further diagnose the issue:
1. Use the BMW App
If your BMW is equipped with BMW ConnectedDrive or similar technology, it may provide app access to your vehicle’s settings. Through the app, you may discover if the remote start feature is enabled or if there are alerts or faults needing attention.
2. Look for Warning Lights
Examine your dashboard for any warning lights that could indicate an issue with the vehicle. If there’s a warning light on, this might prevent the engine from starting remotely.
3. Try Manual Start
To verify that your vehicle is operational, try to start the engine manually. If it starts without issue, the problem likely lies with the remote start system rather than the engine itself.
How to Fix Common Issues
Once you’ve determined the problem, several fixes may restore your remote start functionality. Here’s a closer look:
1. Replace Key Fob Battery
As mentioned earlier, replacing the battery in your key fob is a quick fix if the current one is low.
2. Check Vehicle Settings
If you have access to the vehicle settings through the app or dashboard, ensure that the remote start feature is enabled. Sometimes, settings can get inadvertently changed.
3. Consult the Owner’s Manual
The owner’s manual is a valuable resource. It contains detailed troubleshooting steps specific to your vehicle model regarding remote start and may provide information on reset procedures.
4. Visit a Professional
If you suspect an issue with the receiver or ECM, it’s best to consult a professional mechanic or your local BMW dealership. They have diagnostic equipment that can identify system malfunctions you may not be able to see.
Prevention Tips for Remote Start Issues
While not every issue can be foreseen, there are steps to minimize the chances of your remote start failing. Here are some tips:
1. Regular Maintenance
Ensure that your BMW undergoes regular maintenance checks. Keeping the systems in good condition can prevent potential failures.
2. Monitor Key Fob Battery Life
Be mindful of the battery level in your key fob. If your fob starts displaying inconsistent behavior, it may be a good time to replace the battery even if it isn’t completely dead.
3. Maintain Your Vehicle’s Security System
Keep your security system in check by ensuring all sensors (like door and hood sensors) are functioning correctly.
Conclusion
Experiencing issues with your BMW’s remote start feature can be frustrating, but with good understanding and knowledge of the underlying cause, you can troubleshoot effectively. Whether it’s something as simple as replacing the battery in your key fob or consulting with a BMW professional, addressing these issues promptly can restore your convenience and peace of mind.
In the world of luxury vehicles like BMW, staying ahead of potential problems and understanding how to resolve them is key to enjoying the full experience of ownership. By taking the time to maintain your vehicle’s remote start system, you ensure a smoother and more enjoyable driving experience, no matter the season.
What are common reasons why my BMW remote start is not working?
There are several reasons why your BMW remote start feature may not function as expected. One of the most common issues is a dead or weak key fob battery. If the signal from your key fob is weak, it may not be able to communicate effectively with your vehicle’s remote start system. To check this, try using the key fob to lock and unlock your doors. If it doesn’t work consistently, replacing the battery might resolve the issue.
Another potential reason could be related to your vehicle’s security system. Many BMW models have built-in safety features that prevent the remote start from activating in certain conditions, such as if the doors are not securely closed or if the vehicle is in gear. Ensure that all doors, the hood, and the trunk are closed tightly and check that the vehicle is in park. If the problem persists, consulting your owner’s manual for specific troubleshooting steps or contacting a qualified technician could be beneficial.
How can I reset my BMW remote start system?
Resetting your BMW remote start system can sometimes resolve issues related to functionality. The simplest method is to disconnect your vehicle’s battery. Allow it to rest for a few minutes before reconnecting it. This can sometimes reset the electronic systems within your vehicle, including the remote start function. After reconnecting the battery, try using the remote start feature again to see if it now works.
If the basic reset does not resolve the issue, you may need to delve deeper into the settings. Using the BMW iDrive system or the corresponding settings in your vehicle, check for any specific configurations related to remote starting. Some models may require you to enable or disable certain options to allow the feature to function. If you continue to face challenges, consider consulting your dealership, where they can provide additional assistance.
Could there be an issue with my vehicle’s battery affecting remote start?
Yes, a weak or discharged battery can definitely affect your BMW’s remote start functionality. The remote start feature relies on sufficient power to engage the engine and other electronic systems. If your vehicle’s battery is low, you might find that remote start won’t work at all or is erratic. Regular battery maintenance is essential to ensure that this and other electronic features operate properly.
If you suspect that the battery may be the issue, you can perform a quick test. Check if your vehicle starts normally using the ignition key. If you experience any difficulty starting the car or notice dimming headlights or dashboard lights, it could indicate a weak battery. In such cases, testing the battery voltage with a multimeter or having it checked by a qualified technician can help determine if it needs charging or replacement.
Why does the remote start only work sometimes?
Intermittent issues with the BMW remote start can be frustrating and might stem from various causes. One common reason is that the signal strength from the key fob can be inconsistent depending on distance, obstructions, or even interference from other electronic devices. If you notice that the remote start works well in some locations but not others, interference or distance could be the primary factors at play.
Another potential issue could be linked to the vehicle’s security system, which may sometimes prevent remote start from activating. This can happen if the system detects that the car is not in a safe condition to start, such as if a door is open or the vehicle is not in park. To address this, always check that everything is secure, and consider consulting with your dealership if the problem persists, as they can provide insights specific to your model.
Can cold weather affect my BMW remote start operation?
Yes, cold weather can impact the functionality of your BMW remote start system. Extremely low temperatures can cause a variety of issues, such as thickening of engine oil and the weakening of your vehicle’s battery. Both of these factors can prevent the engine from starting remotely. Cold weather can also affect the responsiveness of your key fob, making it harder for the system to communicate if the fob battery is not in optimal condition.
Additionally, many manufacturers, including BMW, include safety features that prevent remote starting if there are adverse conditions, such as extremely low temperatures. These systems are designed to protect the engine from potential damage caused by starting the vehicle in unfavorable conditions. If you live in a very cold climate, consider checking your vehicle’s manual for any specific guidance on remote starting in winter weather and whether your car is equipped with any additional cold weather features.
Should I consult a professional if my remote start issues continue?
If you’ve gone through the common troubleshooting steps and still find that your BMW remote start feature is not functioning, it may be time to consult a professional. BMW vehicles can have complex electronic systems that sometimes require specialized equipment and knowledge to diagnose correctly. A certified technician at your local dealership or an experienced mechanic can perform a thorough inspection and identify deeper issues that might be affecting your remote start.
Additionally, some remote start issues could be related to software problems that require updates or reprogramming. Professionals have access to the latest software updates and diagnostic tools that can provide clarity on the situation. They can also check for issues with the remote start’s components, ensuring everything is working as it should. Don’t hesitate to seek help if you’re unable to resolve the issue on your own.