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E46 Engine Swaps
Replacing your motor? From direct replacements to more exoctic engines, if it's going under the hood of an E46 3 Series this is the forum to discuss it.

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Old 04-07-2019, 10:07 AM   #1
NomexNinja
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325xi to 330xi with 330i donor

My beloved 325xi 5sp needs a motor. I found a cheap 330i auto donor car that needs a tranny. This seems like an easy and common swap 2wd-2wd from what I've read on here. Is this still a pretty straight forward deal going into a 4wd car? Are the oil pans different on an xi or anything?
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Old 04-07-2019, 12:47 PM   #2
armenh7
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Yes, the oil pan is different in order to clear the transfer case.
What year is the 330i?
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Old 04-08-2019, 08:06 AM   #3
NomexNinja
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The donor 330i is a 2001 and the host 325i is a 2003 facelift car. So I will need a 330xi oil pan. Anything else weird?
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Old 04-08-2019, 11:54 AM   #4
armenh7
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Originally Posted by NomexNinja View Post
The donor 330i is a 2001 and the host 325i is a 2003 facelift car. So I will need a 330xi oil pan. Anything else weird?
Since you have a 325xi, a few things are weird with the electronics.
In 09/02, BMW switched to a newer style valve cover and different type of coils.
In 03/03, BMW switched to MS45.1 for the ecu and no longer used the temp sensor in the intake manifold, moving it to the maf and making it 5 wire instead of 3. This, however, doesn't apply to xi's

You can transfer over your oil pan from the xi. What is the exact month and year for the production date of your car?

Last edited by armenh7; 04-08-2019 at 11:54 AM.
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Old 04-09-2019, 08:12 PM   #5
NomexNinja
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I think it was a February car. It says 02/03 on the door tag. The MAF has 3 wires.
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Old 04-10-2019, 05:10 PM   #6
armenh7
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Should be a direct swap then
Except the valve cover and coils but you van swap those over from the old engine to the new one
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Old 08-23-2019, 08:51 PM   #7
BMannyW
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Any progress?? Seems pretty straight forward. I want to do the same.. I have a 02 wagon 325xi and want to put in a 330..preferably a ZHP.. but I hear the extra 10HP is not worth the extra cost for the engine. Thoughts on ZHP vs. 330?



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Old 08-24-2019, 11:14 AM   #8
armenh7
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Any progress?? Seems pretty straight forward. I want to do the same.. I have a 02 wagon 325xi and want to put in a 330..preferably a ZHP.. but I hear the extra 10HP is not worth the extra cost for the engine. Thoughts on ZHP vs. 330?



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I went from a 325 to 330 engine. It's a huge improvement. I would say since we had 325's in the beginning, the jump to a 330 is significant enough that zhp or not will feel great
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