For the 1985-88 635CSi, you will have to check the part number on your ECU. If your ECU ends in 059, we will need to know the number of pins on your original chip.

For the 1989 635CSi, we only need to know if the car is a manual or automatic.

Note: we will need to know the number of pins on your original chip. It is either 24 or 28 pins. Thanks.

The 2.7 liter inline-6 is a torquey car, however, performance drops off greatly after 4000 RPM. With a TMS Performance Chip power is boosted at all RPM but most importantly in the upper RPM. The car really feels more alive! This chip was tuned on the dyno to yield as much performance from this engine as possible and still maintain its strength and durability. Jim Conforti tuned the fuel and spark maps to take advantage of 91 octane gasoline. By making the engine more efficient with this fuel, gains in horsepower and torque are achieved as well as making the engine run smoother.
NOTE: your car may have a replacement DME ending in 021. Our chips will work in this replacement computer as long as the existing chip is not soldered.

Need to breath more life into your engine? Add a TMS Performance Chip! These chips were tuned by Jim Conforti on the dyno to maximize the engine's efficiency when using 91 octane gasoline. The result is more horsepower and better torque - especially in the mid-range of the RPM band. The car really feels more alive!

Need to breath more life into your engine? Add a TMS Performance Chip! These chips were tuned by Jim Conforti on the dyno to maximize the engine's efficiency when using 91 octane gasoline. The result is more horsepower and better torque - especially in the mid-range of the RPM band. The car really feels more alive!

For the E30 325i/is/iX 1987-92, we need to know the precise year, model, ECU number, and if the car is a manual or automatic.

Performance Chips with Speed Sensor Delete

Pretty much all BMWs use a speed sensor to monitor rpm, ABS and traction control/ASC operation, windshield wiper speed, cruise control and of course the speedometer. In fact, the speed sensor is one of the most vital sensors on the car. The DME relies on the speed sensor signal to set the maximum rpm in each gear. Problems can arise if you have re-wired the car for racing use or with an engine conversion. Some of those problems are:

1. time-consuming re-wiring of the car during engine conversions or when building a racecar harness
2. low rev limits in each gear
3. installation of data-acquisition systems no longer use the speed sensor signal

NOTE: the speed sensor is different than the top speed governor. These chips DO remove the top speed governor, like all of our normal Performance Chips, but these chips are intended for people who have no use for the speed sensor signal.

For 1989-90 525i we need to know the ECU number from the car, and we need to know if the car is a manual or automatic. Choose the options from the list below.

If the car is a 1991-92, we need to know the ECU number. Choose the appropriate option from the box below.

If the car is a 1993-94, there is nothing that we need to know about the car.

For a 1995 525i, we need to know the production date of the car. Please enter this information on your order form.

The 1989-93 535i is a powerful car, however, BMW didn’t spend any more time tuning the car than they had to. The TMS Performance Chip for this car was tuned on the dyno to yield as much performance from this engine as possible and still maintain its great reliability. Jim Conforti tuned the fuel and spark maps to take advantage of 91 octane gasoline. By making the engine more efficient with this fuel, gains in horsepower and torque are achieved as well as making the engine run smoother.

For the 535i, we need to know if the car is a manual or automatic.

The 318i/is needs more torque - pure and simple. A little extra grunt in the bottom-end of the RPM range will get your 318 moving quicker in traffic. The torque gain for this engine starts at only 2500 RPM! If you're looking for a significant bump in power you need not look any further than a TMS Performance Chip. Jim Conforti tuned this chip to take advantage of 91+ octane gas. By altering the fuel and spark curves greater horsepower and torque can be achieved as well as making the engine run smoother and better responsive. There is no downside - only an awakened engine and a car with new life!

For a 1992-95 318i/is/iC/Ti, we need to know the production date, ECU number, and if the car is manual or automatic.

A TMS Performance Chip for the 1992 E36 325i and 1991-92 E34 525i is an absolute MUST-HAVE performance upgrade. This chip was developed on the dyno to increase horsepower and torque from low RPM all the way up to the new 7000 RPM rev limit. Engine management expert Jim Conforti tuned the fuel and spark mapping to maximize output when used with 91+ octane fuel. More power, a smoother engine, and better response are the results. Bang for the buck, this is hands-down the best upgrade to do. The rev limiter is raised to 7000 RPM and the top speed limiter has been deleted.

For this chip we will need to know the part number of the ECU installed in the car.

If you're looking for a significant bump in power you need not look any further than a TMS Performance Chip. Designed to maximize the advantage of premium fuel, Performance Chips safely alter the fuel and timing maps which results in more power and a smoother engine. These chips were tuned by Jim Conforti on the dyno with fantastic results. What you feel is more power starting at 3500 RPM and continuing up to the new rev limit of 7000. There is no downside - only an awakened engine and a car with new life!

For 1993-94 325i we do not need any information from your car.
If your 325i is a 1995 model, we will need the production date of your car. We do not need any other information and you do NOT need to send us your ECU.

Let us know if you are using an E36 M3 engine with these mods in an E30 and we will supply you with a special chip.

For the 1995 M3 we will need to know the production date of your car.