For DIY car enthusiasts and those plagued by the dreaded “check engine light,” having a reliable OBD2 scanner is essential. Among the myriad of options available, Autel has established itself as a reputable brand, particularly in the entry-level market. The Autel MS309 OBD2 scanner is positioned as a step up from their popular MS300 model. But does this slight upgrade offer enough to justify choosing the MS309? Let’s delve into a detailed Autel MS309 OBD2 review to find out if this code reader deserves a place in your garage.
The original Autel MS300 garnered praise for its simplicity and effectiveness in reading and clearing basic OBD2 error codes. The MS309 aims to build upon this foundation by introducing a key enhancement: a larger screen capable of displaying code definitions directly. This seemingly minor change can significantly streamline the diagnostic process.
An image of the Autel MS309 screen displaying diagnostic error codes, highlighting its ability to show code definitions directly on the device.
One of the most notable upgrades in the Autel MS309 is indeed its larger display. Unlike the MS300 which only shows the error code itself, the MS309’s screen provides a brief definition of the code. This feature eliminates the immediate need to consult external resources like your phone or a computer to understand what the code signifies. The MS309 comes with a basic onboard library of OBD2 codes, allowing it to display definitions for common issues directly on the screen. This is particularly useful for quick diagnoses, saving time and effort in deciphering the meaning of those cryptic error codes. However, it’s important to note that this onboard library is limited. For newer or less common codes, you might still need to perform further research online.
Functionally, the MS309 OBD2 scanner operates very similarly to the MS300 and even shares similarities with the slightly more advanced MS409. It’s designed for basic OBD2 functionalities: reading diagnostic trouble codes (DTCs), clearing codes, and reviewing emissions readiness status. It’s a plug-and-play device, making it user-friendly even for those with limited automotive diagnostic experience.
A photograph emphasizing the slim and portable design of the Autel MS309 OBD2 scanner, showcasing its ease of handling and storage.
While Autel mentions the possibility of software updates for the MS309, user experience suggests this feature is not consistently reliable. Therefore, it’s best to consider the MS309 as a tool with its current functionalities, rather than relying on future updates to enhance its capabilities.
In practical testing, the Autel MS309 scan tool performs as expected. It successfully connected to and diagnosed vehicles like a Ford F250 diesel truck and a BMW 3-Series sedan (using an adapter for the BMW). In both instances, the MS309 swiftly booted up, scanned for codes, and effectively cleared them.
Ultimately, the key differentiator between the MS309 and MS300 boils down to the screen and the convenience of onboard code definitions. The MS309 typically costs slightly more than the MS300. The decision to opt for the MS309 hinges on whether you value the added convenience of having code definitions readily available on the scanner itself.
If simplicity and budget are your primary concerns, the MS300 remains a compelling choice. However, for a marginal increase in price, the Autel MS309 OBD2 scanner offers a tangible upgrade in usability thanks to its larger screen and code definitions, making it a worthwhile option for those seeking a slightly more user-friendly entry-level OBD2 tool.
