2003 Buick Century

Asked by GuruZT6TB Oct 21, 2017 at 07:58 PM about the 2003 Buick Century Sedan FWD

Question type: Car Customization

I have a 2003 Buick century that had a motor oil
leak and one day on the way to the mechanic well
let's just say that my engine no longer works and
needs to be replaced. I was wondering if by chance
I could put an engine off of another Buick like the
regal or LeSabre maybe?

2 Answers


Sure ... if it's the exact same GM engine ,,, The biggest headache is if the engines not exact then the ECU (computer) won't be compatible

2 people found this helpful.

The Century and Regal during that time used the same body. Your Century came with a 3100 V6 but the Regal had a 3800 V6, If you went with the 3800 from a Regal or LeSabre at the very least you would also need the ECM that goes with the new engine. Unless you want a wiring nightmare, verify that the ECM in your Century have the same connectors as the new ECM.

2 people found this helpful.

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