A4515458132 Transmission Control Unit for Smart Fortwo 451 – OEM part number compatibility
The transmission control unit with part number A4515458132 (also written as A 451 545 81 32) is designed for the Smart Fortwo 451. When it comes to automotive electronics, correct matching by OEM number is essential – identical appearance does not guarantee compatibility.
If your original unit carries the number A4515458132 or A 451 545 81 32, this module will be fully compatible with your vehicle. The manufacturer code G2T60171HBZE identifies the Mitsubishi Electric version used in this application.
- A4515458132
- A 451 545 81 32
- G2T60171HBZE
Selecting the correct unit by part number eliminates the risk of CAN communication issues, gearbox faults or limp mode activation.
Compatibility – which vehicles use A4515458132?
The A4515458132 transmission control unit is used in Smart Fortwo II (W451) models produced approximately between 2007 and 2014, equipped with automated manual transmissions (Softouch / Softip systems).
Typical applications include:
- Smart Fortwo 451 1.0 71 HP (engine M132)
- Smart Fortwo 451 1.0 Turbo 84 HP
- Smart Fortwo 451 Coupe
- Smart Fortwo 451 Cabrio
Several transmission control variants were used within the Smart 451 range, which is why matching the exact part number A4515458132 is more important than the model year or engine type.
What does the Smart Fortwo 451 transmission control unit do?
The TCU (Transmission Control Unit) manages gear shifting, coordinates with the engine control system and controls the gearbox actuators. A faulty A4515458132 unit may cause:
- gearbox limp mode
- inability to select gears
- missing gear indication on the dashboard
- jerking during take-off
- TCU communication errors
Why the A4515458132 part number must match exactly
Within the Smart Fortwo II (451) platform, multiple software variants of the transmission controller were used. Even vehicles with the same 1.0 engine may require different versions.
Matching the exact OEM number A 451 545 81 32 ensures proper compatibility and prevents adaptation issues or system errors.
FAQ – Smart Fortwo 451 A4515458132
Does A4515458132 fit Smart Fortwo 451 1.0 71 HP?
Yes, as long as your existing unit has the same part number A4515458132 or A 451 545 81 32.
Is A4515458132 compatible with Smart Fortwo 451 1.0 Turbo 84 HP?
Yes, provided the part number matches exactly. Turbo versions also use this controller.
What is G2T60171HBZE in Smart Fortwo 451?
It is the Mitsubishi Electric manufacturer reference identifying the specific electronics version of the transmission module.
How can I check if my Smart 451 uses A4515458132?
The part number is located on the label of the transmission control unit. Compare it directly with A4515458132.
Does the Smart Fortwo 451 transmission control unit require programming?
In some cases, gearbox adaptation may be required after installation depending on the vehicle configuration.
Does A4515458132 fit all Smart Fortwo 451 models?
No, it is only compatible when the part number matches exactly. Different variants require different controllers.
Summary
The A4515458132 transmission control unit for Smart Fortwo 451 is a Mitsubishi Electric module used in 1.0 petrol and turbo versions. The most important factor is OEM number compatibility – if your unit matches A4515458132, it will work correctly with your gearbox.
