It is only necessary to rewax or seal the affected area after repairing the body.
Only BMW approved products may be used to comply with the six year warranty against rust perforation.
These products protect cavities effectively and permanently against corrosion. Their excellent coating and waterproofing properties let them flow into all inaccessible corners and folds for unsurpassed overall protection.
UNDERBODY AND BODY CAVITY SEALING COMPOUND
For sealing of body cavities, such as doors, Apillars,
front, side and cross members, etc.
(Former BMW Part No. 81 22 9 407 479)
3M Part No. 8891
Wurth Part No. 892080
Also: Wurth "Brushable Seam Sealer", Part No. 8901021.
BMW X3 Service & Repair Manual > Zf transmissions: ZF 3HP22, 4HP22, 4HP24
Utilizes Castrol TQ or Texaco Havoline Automatic Transmission Fluids of the Dexron III formulation.
Never mix any other oil with this transmission fluid when doing repairs or topping up.
A5S 310Z (5HP18)
E36
M3 from 1995 to 1999 production
Utilizes a long life filling of synthetic transmiss ...