![How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports](https://s3.us-east-2.amazonaws.com/prod.mm.com/uploads/2021/05/17/1621281252_img_9342_mmthumb.jpeg)
How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports
![Patiently waiting for my car to go to sleep. Parasitic battery drain problem. FSR was changed due to the blower fluctuating from high to low on its own. Resolved that issue but Patiently waiting for my car to go to sleep. Parasitic battery drain problem. FSR was changed due to the blower fluctuating from high to low on its own. Resolved that issue but](https://preview.redd.it/ygv0d45e0mry.jpg?auto=webp&s=07737dfffdfa33982bff5ee62202d524b74678b9)
Patiently waiting for my car to go to sleep. Parasitic battery drain problem. FSR was changed due to the blower fluctuating from high to low on its own. Resolved that issue but
![How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports](https://s3.us-east-2.amazonaws.com/prod.mm.com/uploads/2021/05/17/1621281020_img_7038_mmthumb.jpeg)
How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports
![How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports](https://s3.us-east-2.amazonaws.com/prod.mm.com/uploads/2021/05/17/1621281260_img_9350_mmthumb.jpeg)
How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports
![How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports](https://s3.us-east-2.amazonaws.com/prod.mm.com/img/projectcars/BMW_m3_fuses_battery_drain_pTuRjMW.jpeg)
How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports
![BMW Blower fan not working? How to Diagnose Final Stage Relay (Blower Motor Resistor) Parasitic Draw - Car Repair, & Performance | Fluid MotorUnion | 2108 W. Ferry Rd. Unit 102 Naperville, IL BMW Blower fan not working? How to Diagnose Final Stage Relay (Blower Motor Resistor) Parasitic Draw - Car Repair, & Performance | Fluid MotorUnion | 2108 W. Ferry Rd. Unit 102 Naperville, IL](https://www.fluidmotorunion.com/wp-content/uploads/2020/09/IMG_5383-900x506.png)