Generic OBD2 scanners provide access to basic engine-related diagnostic trouble codes (DTCs) and limited functionality, such as clearing codes and resetting the check engine light. While sufficient for simple issues like misfires, they lack the capability to diagnose more complex problems in systems like the transmission, airbags, or climate control. These generic tools only support standard OBD2 protocols, mandated for all vehicles manufactured since the late 1990s.
OEM-specific scan tools, on the other hand, delve deeper into vehicle diagnostics. They utilize proprietary communication protocols and codes unique to each manufacturer, offering significantly more detailed fault information. This allows for precise identification of problems within various vehicle systems beyond the engine. However, these specialized tools traditionally come with a hefty price tag, often ranging from $2,000 to $5,000 for professional-grade scanners capable of accessing multiple vehicle makes.
Fortunately, affordable alternatives are emerging in the market. While most inexpensive code readers only offer generic OBD2 functionality, tools like the Foxwell NT510/520 provide a compelling solution. Priced around $150, the Foxwell device allows users to purchase and install individual OEM-specific software packages for approximately $60 each. This modular approach grants access to comprehensive diagnostic capabilities for specific car makes without the substantial investment required for professional scanners.
For example, the BMW software package for the Foxwell NT510 provides extensive coverage, accessing not only the engine control unit but also modules for the transmission, brakes, ABS, traction control, airbags, audio system, navigation, climate control, locks, and alarm system. This level of detail rivals that of much more expensive professional scanners.
Considering the functionality and price point, the Foxwell NT510/520 stands out as a top contender for the Best Generic Scan Tool with expandable OEM-level capabilities. Its ability to provide in-depth diagnostics for multiple vehicle makes through affordable software packages makes it a valuable tool for both DIY enthusiasts and professional technicians. The initial $150 investment includes one OEM-specific software package, making it a cost-effective solution for those needing comprehensive diagnostics for a single car brand. For broader diagnostic needs, additional software packages can be purchased, offering a flexible and scalable solution.
