23
E46 Models
Final Drive
The final drive is the compact (HAG
188K) type that is lighter in weight
than the type used on the E36.
Features of the compact final drive
assembly include:
• Compact housing
• Shorter pinion shaft
• Hollow drive flange shafts
• No side bearing covers
• Elimination of speedometer gear
• Lifetime synthetic oil
Limited slip differential is no longer possible with the compact differential.
The drive shaft and differential are now mounted on the center line of the vehicle. This
enables the transmission tunnel to be narrower increasing the interior passenger space.
With this change, the axle shafts are now different in length and are no longer interchange-
able.
Brake System
The braking system is upgraded for the E46 to match the vehicle’s size and braking require-
ments. The dual circuit (front/back) distribution system continues to be used for optimized
braking response and performance. Refinements to the brake pedal linkage increase the
brake response time to improve braking performance.
Single piston floating calipers with vented rotors are
used on the front and rear brakes.
The E46 uses a 10" vacuum booster, vented in the engine compartment to reduce noise in
the passenger compartment.
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