Q: Can i put an automatic engine on a manual bmw?

asked by on

My car is a 1993 325i manual with over 200 thousand miles and the engine I want to put in is a bmw 2001 325ic automatic with a little over 58 thousand miles is that possible?

My car has 200000 miles.
My car has a manual transmission.

If you want to use an OBD-II controlled engine (2001 versus 1993), you will have to completely replace the entire electrical system on your 1993 324i (i.e., use only the 2001 model year electrical system and computers). The engine computers for the two engines you are referring to are not interchangeable. And, you cannot flash re-program your existing computer to work with the new engine because the two use vastly different computer hardware (physically different PCM’s). In addition, as noted, the wiring harnesses are completely different, and the TCM (transmission control module) will have to be completely changed as well. As if that isn’t enough, once you substitute a new PCM and TCM they will not work with the other computers on the vehicle such as the body control module but there are many other microprocessors involved as well. In the modern era, really the only way engine/transmission swaps like this can work is if you literally carry over ALL electronic controls and wiring that are associated with the donor engine to the recipient vehicle. In addition, you would have to modify the vehicle’s suspension due to the different weights of the two engine/transmission combinations. Obviously, all of these barriers make it very impractical to use anything but the original engine and so few people attempt these modifications. If, however, you are interested in an engine replacement (OEM to OEM), YourMechanic professionals in certain locales can assist with that. Please simply inquire based on your locale. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Can i put an automatic engine on a manual bmw?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine won't start

A faulty Intelligent Battery Sensor (IBS) can result in a no start condition. Inasmuch as IBS on your vehicle is a sensitive electro-mechanical device, it is subject to all the usual faults arising from mechanical stress, vibration, age, and electrical...

Q: The front passenger floor board in my car is damp, and the windows fog up on the inside

Have the A/C system checked to see if the drain is clear for the A/C evaporator case. If you park under or around trees that shed a lot then it can get debris into the A/C and clog the drain,...

Q: Ac not blowing cold air what refrigerant do i use

R134A is the correct refrigerant to use. You'll need to have the A/C checked to see if you have a leak or another problem causing your power loss during acceleration. Another possibility is the AC compressor dragging against the belt...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.