Xtreme Stage 3 Performance Tuning Chip EPROM for 1991 BMW E31 850i
Programmed Specifically for Your Vehicle
This chip upgrades the stock transmission ECU software, providing smoother shifting.
Works with Transmission ECU code: ECU 0.260.002.125
Compatible with Automatic transmissions only
Unlock your vehicle’s hidden potential! Typical gains include:
Better 0-60 Times
Includes everything needed to install
1 Stage 3 Xtreme Transmission EPROM Module
1 Instruction / Install Sheet
Frequently Asked Questions
Do I need any special tools or automotive knowledge to install?
No! the Xtreme Chip is 100% plug and play. It is tuned for your specific vehicle make and model. Beware of cheap $10-50 mega horsepower products. They are fake and are a plastic box with a .10 cent resistor.
Does this product work with automatic and manual transmissions?
Will this product void my warranty?
No it will not void your warranty, many dealers frown on performance upgrades. However, the manufacturer cannot void your warranty for adding aftermarket parts.
Can this harm my engine or vehicle electronics?
No. Our products have been dyno tested and proven to work with no negative effects on the vehicle.