1987-1992 BMW E30 325i/is E34 525i Bosch ECU 173 +22HP Xtreme EPROM Performance Chip
STAGE 3 Xtreme EPROM PERFORMANCE RACE CHIP
Designed for the 1987-1992 BMW
E30 325i 325iS 325i convertible, E34 525i 525iS
Stage 3 Xtreme Chip – Engineered specifically for Your Vehicle
This chip unleashes more power by re-programming the fuel mixture and timing parameters
of the engine management system. The rev-limit is lifted, giving your vehicle a broader power band.
Works with ECU code models:
ECU 0 261 200 173
Horsepower Gain:+22 HP
Raised rev limiter:7000 RPM
Top speed limiter removed
Requires Premium Octane Fuel (91+)
Unlock your engine’s hidden potential! Typical gains include:
- Faster Acceleration / 0-60 Times
- Up to 3+ mpg increase
- 22+ Horsepower increase
- Better throttle response
- Installs in minutes
- Up to 35% added torque
- Reduced emissions
- Better 1/4 mile times
- Prolongs engine life
- Smoother idle
- Better towing power & improved passing ability
Includes everything needed to install
- 1 Stage 3 Xtreme EPROM Module, Custom programmed for YOUR vehicle
- 1 Instruction / Install Sheet
- 1 Antistatic Chip Bag
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?
Yes – Both.
Does this product work with 2WD or 4WD?
It works on both types if your car has options
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.
How much horsepower will I gain?
Results vary depending on vehicle condition, fuel grade used, etc., but will be around 22+HP. The chip recalibrates the ignition and fuel based on the variables such as the fuel octane, ambient air temp and other sensors in addition to driving style.
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. We guarantee this!
How does this product work?
It plugs into your ECU module, replacing the stock chip. The chip modifies signals sent to your vehicle’s ECU computer. It optimizes functions such as ignition timing, air fuel mixture, fuel maps and produces more power and better gas mileage. The ECU of modern vehicles controls many variables which ensure the best engine performance. It does this by reading values from a multitude of sensors within the engine bay, interpreting the data using multidimensional performance maps (tables), and adjusting the engine accordingly. It does this in real-time.
- 3 oz
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