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BMW OBD scanner: How to choose the best one

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BMW OBD scanner: How to choose the best one
If you're a BMW driver, you've likely heard that iconic "ding" when a dashboard warning light pops up. 
 
Whether it’s a routine service reminder or the alarming flash of the check engine light, it’s never a welcome sight. 
 
But with the right tool, understanding what’s going on under the hood doesn’t have to be a guessing game. A BMW code reader can help you quickly diagnose issues and even handle simple fixes, saving time and money in the long run. 
 
In this guide, we'll explore everything you need to know about BMW OBD scanners, from their history and how they work to choosing the best OBD scanner for you and your car. 
 
Get BMW OBD scanner
 

What is a BMW OBD scanner, and why do I need one? 

 
An OBD scanner is a diagnostic tool that plugs into your vehicle's OBD port to read diagnostic trouble codes (DTCs) and monitor systems such as the engine and transmission. It helps you identify problems early and prevent costly repairs. 
 
Advanced BMW OBD scanners, like OBDeleven, take it a step further. These tools allow car owners to customize hidden vehicle settings, such as disabling the start/stop system, changing the dashboard theme, or even extending the battery range in hybrid models. 
 
Note: We’ve covered the top 5 hidden BMW comfort features in a blog post here
 
Plus, modern BMWs often require specialized tools for certain maintenance tasks. But with the advanced OBD tool, you can handle many of these yourself. This includes resetting the oil change interval, releasing rear brake pads for replacement, and even registering a new battery. 
 

A brief history of OBD 

 
In 1968, Volkswagen introduced the first on-board computer to manage fuel injection. Although it didn’t include diagnostic functions, it marked the beginning of on-board vehicle technology as we know it today. 
 
Over the next few decades, car manufacturers began developing their own diagnostic systems, but it wasn’t until 1988 that the California Air Resources Board (CARB) required basic diagnostic capabilities for fuel-related issues in all cars sold in California. This system, later called as OBD1, allowed mechanics to read engine faults, but each manufacturer used different connectors and codes across brands. 
 
To solve this, in 1994, the CARB introduced the OBD2 standard, which improved emissions testing and diagnostics. Unlike its predecessor OBD1, OBD2 provided a standardized connector shape and a universal set of trouble codes across all manufacturers. This change made it far easier for mechanics to identify and fix issues, regardless of a vehicle's make or model. By 1996, OBD2 became mandatory for all cars and light trucks sold in the United States. 
 
Europe adopted a similar standard – EOBD – in 2001 for gasoline vehicles, extending it to diesel vehicles in 2004. 
 
In 2008, the Controller Area Network (CAN) bus standard became mandatory for all vehicles sold in the U.S. The CAN bus significantly improved the speed and efficiency of data exchange between vehicle systems, further advancing on-board diagnostics and paving the way for more sophisticated automotive technologies we see today. 
 
on-board diagnostics evolution timeline
 

How do BMW scanners work? 

 
As soon as you plug a BMW scan tool into your vehicle, it starts communicating directly with your car’s systems. Let's break down this process in detail. 
 
1. Connecting to the OBD2 port 
 
The OBD2 port is where you connect your scanner. In BMW vehicles, you’ll typically find it under the dashboard, close to the hood release lever. 
 
The OBD2 port has 16 sockets, but not all are active, as their use depends on the vehicle make, model year, and region. 
Below is a diagram that shows the purpose of each socket. 
 
OBD2 port pinout
 
The type of OBD scanner you need depends on the socket configuration. For example, OBDeleven works on most cars that use the CAN bus protocol. To check if your car has a CAN bus, look at the OBD2 port – 6 and 14 sockets should be active. BMW has been using the CAN bus in all of its models since 2008. 
 
2. Reading OBD error codes 
 
Each time your vehicle's on-board computer detects a problem, it generates an OBD code and stores it in the memory of a control unit. When you start scanning your
BMW with a code reader, it begins requesting diagnostic trouble codes from each control unit. The control unit then sends back a response with all its codes. 
 
Note: You can find an explanation of the most common BMW fault codes here
 
These codes fall into two main categories: 
 
  • Standard OBD2 codes: These universal codes apply to all makes and models of vehicles equipped with the OBD2 system. They cover engine codes and other systems related to vehicle emissions. 
  • Manufacturer-specific codes: BMW and other brands use these codes to address problems that standard OBD2 codes don't cover, such as comfort and safety systems.  
 
Each code typically begins with a letter indicating the affected system (e.g., P for powertrain, B for body) and is followed by numbers identifying the specific problem. For example, P0301 indicates a misfire in cylinder 1. 
 
Further reading: OBD diagnostic trouble codes 
 
BMW-specific codes address a much wider range of faults compared to general OBD2 codes. The chart below highlights the difference in their coverage. 
 
 

What types of BMW OBD readers are available? 

  
Basic handheld readers 
  
These are the basic OBD2 readers, with only a few essential functions, such as reading and clearing diagnostic codes. They typically have a few buttons and a simple display for ease of use.  
 
These days, handheld readers are relatively inexpensive, making them popular among car enthusiasts and small independent repair shops for quick diagnostics and repairs. 
 
However, basic readers don’t come without drawbacks. Most of them only diagnose generic fault codes and lack additional features.  
 
So, while useful for figuring out basic issues in your car, they won’t offer much beyond that. 
 
Dealership diagnostic tools 
 
These are typically developed and managed by BMW and are only available to authorized BMW workshops or dealerships.  
 
Professional tools like these can not only read fault codes, but also access all vehicle systems, make modifications, run advanced diagnostics, perform programming, and even update BMW software.  
 
While dealership tools are undoubtedly some of the best diagnostic tools in the industry, they're rarely accessible to everyday users. 
 
In addition, these tools have a steep learning curve, and even if you do get access to one, they can cost thousands of dollars, if not more. 
 
Next-generation Bluetooth readers 
 
These modern diagnostic tools combine the advantages of handheld readers and professional diagnostic tools.  
 
Typically, you get a small device that plugs into your car's OBD2 port and an app for your smartphone or tablet. The mobile app allows you to run advanced diagnostics and even customize your vehicle. 
 
Our OBDeleven NextGen device does exactly that while staying within an affordable price range – perfect for car owners who want more control without the cost of professional tools. 
 

What to look for when choosing an OBD scanner for your BMW 

 
With a wide variety of diagnostic tools available, finding the right one for your BMW can be challenging. From basic OBD2 code readers to advanced dealership-level scanners, each type offers different features, prices, and capabilities. 
 
To help you make the best choice, we've outlined the most important criteria to consider when selecting the perfect OBD scanner for your BMW. 
 
Compatibility 
 
Not all OBD scanners are created equal. Most OBD2 scanners can read generic trouble codes for the engine or transmission. However, for more in-depth diagnostics, automakers such as BMW also use the above-described manufacturer-specific codes that basic scanners often don't cover. 
 
Also, different vehicle models have different OBD port setups that can affect a scanner's compatibility. 
 
Choosing a BMW scanner explicitly designed for your car ensures that it can access all systems – not just the engine but also ABS, airbags, multimedia, dashboard, and more. 
 
Fault code reading and clearing 
 
Although these are basic functions that any code reader should have, some readers require an annual subscription to clear codes or gain full access to code descriptions, while others provide this functionality for free. Also, don't forget to check if the reader can read BMW-specific trouble codes for a more comprehensive view of issues. 
 
Workshop functions 
 
More advanced scanners can offer workshop-level functions that simplify maintenance tasks. For example, they can reset the oil change interval, release rear brake pads for replacement, perform battery registration after replacement, or even run component tests. 
 
Using these features as guided by your car’s user manual could save you a significant amount on maintenance. 
 
Coding and customization 
 
Some BMW-specific scanners also offer coding capabilities to unlock and customize your car's hidden settings. With coding, you can change how your lights work, disable the start/stop function, or even enable new features that weren't available by default. This gives you more control over your car's functionality. 
 
Live data monitoring 
 
The live data feature allows you to monitor real-time data from your vehicle, such as engine speed, load, boost pressure, various sensor readings, and more. With some understanding of your car, this feature becomes a handy tool to identify faults and spot unusual behavior early, before it becomes a serious problem. 
 
For example, if your car has a fault code for lean fuel trim, that means too much air or not enough fuel in the air-fuel mixture. Monitoring the live data can help you identify the cause. You may notice that boost pressure stays within limits, but fuel pressure drops during hard acceleration – a potential sign of a weak fuel pump. 
 
User-friendly interface 
 
Choose a scanner with an intuitive, easy-to-use interface. Look for straightforward navigation, simple fault code explanations, and data interpretation options that match your technical expertise. 
 
OBDeleven One-Click Apps list for BMW
 
Manufacturer licenses 
 
It's always a good idea to check if the OBD scanner is licensed by the automaker, in this case – BMW. 
 
Before earning a license, diagnostic tools must pass strict safety regulations set by the manufacturer, reducing the risk of errors that could damage your car’s electronic systems. 
 
Unlicensed tools, on the other hand, can be risky as they may introduce errors, malfunction, or even compromise vehicle security. Even unauthorized access to your personal information might be the case here.  
 
Regular updates  
 
BMW releases new models every year, bringing the latest technologies, additional systems, new protocols, and more DTCs. That's why you should choose a scanner that receives regular software updates to keep up with the latest models. 
 
A good scanner also has strong development support that regularly adds new features, fixes software bugs, and releases security updates to improve reliability. 
 
Price and value 
 
Code readers vary in price. Unlicensed or cracked scanners are often available from a few dollars, but there's no guarantee they'll work properly – or worse, they could even damage your vehicle's systems. Licensed, higher-quality scanners come at a higher price but offer peace of mind by ensuring compatibility and reliability.  
 
Subscriptions are also a factor – some cheaper models have paywalls for essential features like code reading and clearing, while more expensive ones often include full diagnostics and access to other features at no extra charge. A quality scanner may cost more upfront, but it will save you money and hassle in the long run. 
 
OBDeleven diagnostic tool
 

OBDeleven for BMW diagnostics 

 
OBDeleven is a solid choice for BMW drivers looking for reliable diagnostics and customization options. It provides access to every available control unit in your vehicle, turning your smartphone into a powerful diagnostic tool with advanced functions at your fingertips. 
 
Advanced BMW diagnostics 
 
OBDeleven goes beyond generic OBD2 code reading, providing full diagnostics for all systems in your BMW, including the engine, transmission, ABS, dashboard, airbags, and more. This level of access ensures that you can identify and fix even complex problems that many generic OBD scanners may overlook. 
 
Here's how to scan trouble codes with OBDeleven:  
  
1. Plug in the OBD2 reader in BMW diagnostic port. 
  
OBDeleven device in hand
  
2. Turn on the ignition. You don’t need to start the engine.  
 
3. Connect your OBDeleven device to the app. Open the OBDeleven app and tap "Connect" in the center of the screen. 
  
OBDeleven connection screen
  
4. Scan the codes. Tap the scan button in the center of the screen and wait a few minutes while it reads your vehicle's systems. 
  
OBDeleven scan screen
  
5. Open the list of faults. Tap on any icon that has faults, or on the list of control units, and open each one that's marked as "Faulty." 
   
OBDeleven scan result OBDeleven fault list
 
6. Interpret the codes. Each fault code has a brief description. For more information, tap the "G" icon on the right. This will take you to Google results for the exact code for your car model. 
  
 
Easy customizations with One-Click Apps 
 
Another feature BMW owners like is our pre-built customizations – One-Click Apps. They make modifying your car easy without needing to code anything manually – our team has done it all for you. 
 
With One-Click Apps, you can enable, disable, or adjust various comfort, safety, and driving features, such as: 
 
  • Start/Stop system operation 
  • Comfort window controls (opening and closing)   
  • Side markers    
  • Interior and exterior lighting    
  • Startup animation  
  • Instrument cluster style  
  • Auto-folding mirrors   
  • And much more 
 
Note that available features depend on your BMW model and equipment. For instance, if your vehicle lacks a compatible navigation system, sport displays won’t be accessible. 
 
To use One-Click Apps for BMW, you'll need to get Credits – our in-app currency. Each activation costs from 10 credits, which is about $2.19. 
 
 
 
Service and maintenance functions 
 
OBDeleven also offers a range of One-Click Apps for service functions essential to BMW maintenance. You can perform an oil reset, release the rear brake pads for replacement, and even register a new battery after replacing it. 
 
User-friendly interface 
 
The OBDeleven app, available for Android and iOS devices, is designed to be easy to use for both professional and everyday users, regardless of skill level. 
 
Licensed and up to date 
 
As an officially licensed diagnostic tool, OBDeleven works seamlessly with all 2008 and newer BMW models. The license guarantees regular software updates that keep the tool compatible as BMW introduces new features and models. 
 
Additionally, using OBDeleven won’t void your vehicle’s warranty just for using it. This tool complies with strict manufacturer guidelines, ensuring that all diagnostics and maintenance keep your car’s systems safe and intact. 
 
Note: Improper use of OBDeleven can still cause vehicle damage that's not covered by your warranty. For example, disabling safety features is your responsibility, and the warranty may not cover losses or repair costs. Always use caution and ensure you understand each function before making any changes. 
 

To sum up 

 
Choosing the right OBD scanner for your BMW comes down to your needs, budget, and preferred features. Options range from basic engine code readers to advanced tools like OBDeleven, which offer full diagnostics and customization. 
 
If you're looking for an officially licensed, reliable diagnostic tool that lets you read and clear all fault codes for free and customize your car, OBDeleven is your go-to choice.