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MLR Engineering SMG Components

The sequential manual transmission is an excellent gearbox that provides lightning-fast shifts and manual control. Due to the cutting edge design and awsome performance it allows, certain components may need to be serviced from time to time.
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MLR Engineering - Corporate Logo
T#:8645197
Part#: 30.103
Ships Jul 9, 2025
$ 529.99 USD
Free Shipping on orders $49 and up
This is a direct replacement for your dead or tired SMG pump motor. The kit Includes: 1 High torque DC motor 1 Drive coupler 22 Piece seal kit 1 Stainless re-usable clamp 6 installation screws 1 Grease packet
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MLR Engineering - Corporate Logo
T#:8645182
Part#: 10.102
Ships in 7 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
This temperature sensor is located on the block of the hydraulic unit and it measures the temperature of the hydraulic fluid.
MLR Engineering - Corporate Logo
T#:8645192
Part#: 10.112
In Stock
$ 89.00
$ 82.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 89.00
$ 82.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Includes new seal, boot and lock ring to rebuild your SMG clutch actuator. Repair for OEM slave cylinder 21547507022, 23427507097

MLR Engineering - Corporate Logo
T#:15247143
Part#: 10.205X
In Stock
$ 155.00
$ 143.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 155.00
$ 143.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up

Full aluminum construction expansion tank used when relocating your SMG reservoir or installing a CSL type airbox.

This beautiful constructed custom aluminum expansion tank from MLR Engineering is designed for a remote location away from the intake manifold. Solving the issues of prone to failure plastic reservoirs, this will be the last reservoir you ever have to replace.

Moving the expansion tank away from the intake manifold solves space constraints, reduces overall hydraulic fluid temperature and/or reduces common degradation of plastics due to high temperature environments such as the engine bay.

Typical use cases of this product could also be:

When installing a CSL type airbox on an M3 with SMG transmission
Relocating the SMG pump

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MLR Engineering - Corporate Logo
T#:8645186
Part#: 10.109
Ships in 7 Business Days
$ 92.00 USD
Free Shipping on orders $49 and up
The pressure sensor is located on the block of the hydraulic unit and it measures the pressure of the hydraulic fluid. Due to the location of the sensor the instrument usually fails as a result of the excessively high ambient temperature within the engine bay, damaged pins from user installation and/or corrosion.
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MLR Engineering - Corporate Logo
T#:8645184
Part#: 10.107
Ships in 7 Business Days
$ 449.99 USD
Free Shipping on orders $49 and up

BMW E46 M3 SMG Pump Motor is a direct replacement for a worn or malfunctioning SMG pump motor. Designed to restore the performance of the SMG transmission system, this motor ensures smooth and reliable gear shifts.

  • Direct Replacement: Specifically designed for the BMW E46 M3, making it easy to replace a faulty SMG pump motor.
  • Complete Kit: Includes everything needed for installation, such as a high-torque DC motor, drive coupler, new installation screws, sealing gasket, and grease packet.
  • Enhanced Performance: Restores optimal function to the SMG transmission system, ensuring consistent gear changes.
  • 1-Year Warranty: Provides peace of mind with a one-year warranty covering defects and performance issues.
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MLR Engineering - Corporate Logo
T#:8645195
Part#: 10.290
Ships in 7 Business Days
$ 699.99 USD
$ 699.99 USD
Upgraded SMG tank with cooling fins and drain plug for easier serving of the SMG system. Kit contains, New aluminum oil pan New gasket/seal Mounting hardware
MLR Engineering - Corporate Logo
T#:8645198
Part#: 30.105
Ships in 7 Business Days
$ 599.99 USD
$ 599.99 USD
This is a direct replacement for your dead or tired SMG pump motor.

MLR Engineering - Corporate Logo
T#:28104809
Part#: 10.255.1
Ships in 7 Business Days
$ 175.00 USD
$ 175.00 USD

Upgrade your SMG system with the innovative MLR Engineering E46 M3 SMG Pump Relocation Bracket—a groundbreaking solution designed to boost performance and simplify maintenance.

This relocation bracket seamlessly moves the SMG II pump to the passenger side compartment, eliminating concerns about heat affecting pump performance in the engine bay.

Crafted with precision and engineered for excellence, these brackets utilize factory mounting positions on the pump for easy installation. With full rubber isolators and stainless steel hardware included, your pump is securely mounted and protected against vibrations and corrosion.

Enhance your driving experience with the E46 M3 SMG Pump Relocation Bracket—because optimizing every detail is crucial for top-notch performance.

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MLR Engineering - Corporate Logo
T#:8645194
Part#: 10.222
Ships in 7 Business Days
$ 89.99 USD
$ 89.99 USD
Includes new seal, boot and lock ring to rebuild your SMG clutch actuator. Repair for OEM slave cylinder 23427507098
MLR Engineering - Corporate Logo
T#:8645191
Part#: 10.111
Ships in 7 Business Days
$ 103.99 USD
$ 103.99 USD
New Viton rubber inner SMG pump seals, ideal for replacing cracked and dried up OEM rubber seals. Kit Includes all seals in lower high pressure gear pump 2 inner pump gear seals 1 high pressure output o-ring 1 housing snout o-ring
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MLR Engineering - Corporate Logo
T#:29234332
Part#: 30.203
Ships in 7 Business Days
$ 60.00 USD
$ 60.00 USD
Over time, the rubber o-rings and seals found on SMG solenoids can wear out. This can lead to several performance and driveability issues, such as slipping in and out of gear. If your SMG III transmission is in need of repair, choose MLR Engineering seal kits for reliable and proven performance.
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MLR Engineering - Corporate Logo
T#:8645193
Part#: 10.214
Ships in 7 Business Days
$ 299.99 USD
$ 299.99 USD
Viton rubber seals to replace your old worn out OE rubber seals. Kit includes Inner seals 16 Solenoid seals Reservoir seal Hardware
MLR Engineering - Corporate Logo
T#:8677192
Part#: 30.108
Ships in 7 Business Days
$ 799.99 USD
$ 799.99 USD
Custom designed SMG pump with a increased output for faster system priming and longer life then the factory pump.