Resetting Oil Service Light on BMW 840i/M850i: Comprehensive Guide

Last Updated on April 15, 2024 by Nick

Greetings, fellow Bimmer lovers! Today, we have an exciting topic to delve into: how to reset the service light on your beloved BMW 840i or M850i (F14 F15). If you’ve ever found yourself perplexed by the glowing service indicator on your dashboard, fret not! Sit back, relax, and allow us to guide you through this process step by step.

Resetting Oil Service Light on BMW 840i/M850i: Comprehensive Guide

Understanding the Basics

Before we dive into the nitty-gritty of resetting your service light, let’s first understand why it illuminates in the first place. Your BMW is equipped with advanced onboard diagnostics that monitor various aspects of your vehicle’s health, including oil levels, brake pads, and engine performance. When it’s time for routine maintenance or a service check, the service light illuminates to alert you.

Step-by-Step Guide to BMW 840i/M850i Service Reset

Now, let’s get down to business. Follow these simple steps to reset the service light on your BMW 840i or M850i:

Step 1: Initiating Diagnostic Mode

  • Press the START button three times consecutively.
  • Wait until “Diagnostic Mode Active” appears on the display.
BMW Service Light Reset Illustration

Step 2: Accessing the Service Menu

  • Hold down the BC button on the turn signal lever for 15 seconds.
  • Release the button when the service menu appears on the display.

Step 3: Navigating to the Engine Oil Menu

  • If the displayed menu is not “ENGINE OIL,” use the BC button to scroll through until you find it.

Step 4: Initiating the Reset Process

  • Hold down the BC button until “RESET” appears on the screen.

Step 5: Completing the Reset

  • Once “RESET” is displayed, hold down the BC button again.
  • Wait until the reset progress bar reaches completion, indicating that the reset process is finished.


Congratulations! You’ve successfully reset the service light on your BMW 840i or M850i. By following these simple steps, you can ensure that your vehicle’s maintenance indicators are accurately monitored and managed. Remember, regular maintenance is key to keeping your BMW performing at its best for years to come.

FAQs (Frequently Asked Questions)

How often should I reset the service light on my BMW?

It’s recommended to reset the service light after each routine maintenance service to ensure accurate monitoring of your vehicle’s health.

Will resetting the service light affect my warranty?

No, resetting the service light will not void your warranty. It simply clears the indicator after maintenance has been performed.

Can I reset the service light on my BMW without accessing the service menu?

No, accessing the service menu is necessary to reset the service light properly.

What if the service light continues to illuminate after resetting?

If the service light persists after resetting, it may indicate a more serious issue that requires professional diagnosis and attention.

Is it possible to reset the service light on other BMW models using the same method?

While the process may vary slightly depending on the model, the general steps for resetting the service light are similar across most BMW vehicles.

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