BMW 3: Engine identification
B46TU engine
Engine identification - transverse mounted shown
B48TU engine
Engine identification - transverse mounted shown
- Engine number
- Engine identification
The 7-digit engine identification is located on the crankcase in the area of the mounting for the crankshaft alignment pin. The first 6 digits of the engine identification code. Only the seventh digit is different. The seventh digit of the engine identification code is the test number of the type approval certification.
The 4th digit in the engine identification shown above is an A, this represents its a transverse mounted engine that will be installed in the F39 M35i. The G20 and G29 will have a B in the 4th position that represents the engine is longitudinal mounted.
The consecutive engine number is embossed above the engine identification. Using these two numbers the engine can be clearly identified by the manufacturer.
Technical data
The B46B20O1 and B46B20T1 engine is described:
Model overview
The table below provides an overview of the models in which the new B46TU and B48TU engine is used.
READ NEXT:
Engine housing, Crankshaft drive
Engine housing
Cylinder head
The cylinder head is made of aluminum.
Only slight modifications have been made to the B46TU head compared to the B46.
Cylinder head
Crankshaft drive
Crankshaft
Comparis
Connecting rod - Crankshaft drive
Connecting rod
Piston
Area transferring the force
Wrist pin
Connecting rod bearing with shaped bore hole
Connecting rod
Connecting rod bearing (B46TU only)
Small connecting rod eye (trapezoid
SEE MORE:
Safe working practices for working on a high-voltage system
The following description of the repair of the high-voltage components is
only a general list of the
content and the procedure. In general, only the specifications and instructions
in the current
valid edition of the repair instructions apply.
Before working on high-voltage components of the G20&
Start/Stop button
Concept
Pressing the Start/Stop button
switches drive-ready state on or
off.
Steptronic transmission: the
drive-ready state is switched on
when you depress the brake pedal while pressing
the Start/Stop button.
Pressing the Start/Stop button again switches
drive-ready state back off and standby sta
