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BMW Automatic Transmission Fluid and Filter Change DIY – E34, E36, A4S-310R, 325i, 328i, 525i, Others

January 19, 2012

This answer is applicable for many BMWs in addition to the one listed below.

Q
car year: 1995
car model: 525i
Do you have any videos I can watch for changing transmission fluid and differential fluid.

A
We do now have a DIY video for automatic transmission fluid changes (we are working on one for differential fluid changes) .  The DIY is performed on a different transmission than the one in your 525i, but the principles are the same.  See the link below.  The Bentley repair manual for the E34 chassis (5-series 89-96) does cover these task, as the various ones for the other BMW and MINI models do.  We also have a few newsletter DIY articles on these procedures (see links further below).

Click HERE for auto transmission fluid and filter change DIY video.

Our DIY automatic transmission article (below) is done on a later model V8 5-series so the drain and fill plug locations are different, but the overall procedure is the same for your 525i and other BMW models . The A4S-310R (also known as 4L30E) transmission in your 525i, was also used in all E34 525i and 525ti models from 91 through 96, and the E36 3-series models (3i8i, 318is, 318ic, 323is, 323ic, 325i, 325is, 325ic, 328i, 328is, 328ic models 92-98, no M3). This transmission has a drain plug on the bottom of the main pan (the larger pan) and the fill plug is on the side of the pan, on the driver side, toward the rear. We also recommend that you drop the smaller forward pan in order to remove more of the old fluid. There is no drain plug on this pan, so you just loosen the mounting bolts and allow the pan to lower at one end, then fully remove it.

Click below for automatic transmission fluid and filter change DIY:

The DIY article on the differential fluid would be the most applicable to your 525i. The fill and drain plugs will be in similar locations.  This same article also shows a fluid change for manual transmissions.

Click below for differential and manual transmission fluid change DIY:

In addition to the fluids and the filter, you will need the Allen tool set (for the differential plugs and maybe the auto trans plugs) and the fluid pump (to get the new fluids up into the trans and differential).  And, finally, we would recommend installation of our high-power magnetic drain plugs.  These will collect the microscopic metal wear particles, keeping them from flowing through the assembly between fluid changes.

Transmission and differential plug tool set:

Fluid pump:

Magnetic drain plugs:

Differential and transmission fluids
(ID your BMW or MINI and then search “differential fluid” or “transmission fluid”):


Automatic transmission filter kits:

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