Modern vehicles have complex electronic system with number of electronic control units (ECUs). The functionality of these ECUs are monitored by logging the data obtained from these ECUs. Recording and storing large amount of data is not an efficient way, often it is not possible because of limited hardware and software resources. Also, the analysis of large amount of data can take a considerable time and effort. This thesis put forward the design of a WLAN based generic vehicle data logger for quick integration into the vehicle system. The main goal of the thesis is to develop a WLAN based generic vehicle data logger for a vehicle, which can filter only useful data and also exibility of changing the parameters of the data logger. Since, most existing data loggers are application specific nature and lack of data filtering and processing capabilities. WLAN based generic vehicle data logger is developed to overcome these problems. The software which is developed, runs on a STM32 evaluation board and WLAN module. CAN bus transfers the real data from vehicle. ST Microelectronics provides a wide range of connectivity modules and basic software packages to enhance the speed of development. By choosing a suitable WLAN module with inbuilt TCP/IP stack it is possible to upload the useful data onto the server over internet. TCP/IP also provides many application level protocols like HTTP, TFTP, FTP, SMTP thereby it's possible to compare the different protocols for speed and reliability. In this thesis work, Chapter 2 presents the state of the art, a study of different data loggers, analysis of available options, comparison and the justification for designing WLAN based generic vehicle data logger. Chapter 3 represents the concept and study of desired specifications of the WLAN based generic vehicle data logger and also choosing the suitable hardware platform for it. Chapter 4 explains hardware development and integration of different modules with hardware platform. Software implementation of thesis design is presented in chapter 4 and results are discussed in chapter 5. Conclusion and future work is in chapter 6.