The MK3 Nissan Steering Lock Emulator (MK9578) replaces the OEM ESL/ELV steering lock found in many Nissan & Infiniti vehicles from 2008–2012.
Steering lock failure is one of the most common no-start issues in Nissan models such as Altima, Maxima, Patrol, Murano, 370Z, GT-R, Qashqai, Juke, and Micra.

When the factory steering lock fails mechanically, the key and ignition operate normally — but the engine will not start because the ESL cannot unlock. Dealership replacement requires buying a new steering lock module and programming it, which is expensive and time-consuming.

This emulator bypasses the faulty steering lock electronically and restores immediate start authorization.
No coding or programming is required — simply connect and start the vehicle.

Manufactured by MK3, the emulator includes high-quality electronics, OEM-style lock/unlock sound, and durable reinforced connectors.

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🔧 Features

• System Type: Steering Lock Emulator (ESL/ELV)

• Operation: Plug & Start – No Programming Required

• Manufacturer: MK3

• Model Number: MK9578

• Condition: Brand New

• Weight: 34 g

• Sound Output: Built-in lock/unlock sound

• LED Indicators:

  • Green: Steering lock unlocked (vehicle can start)

  • Red: Steering lock engaged / wrong condition

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⚙️ Technical Overview

The OEM Nissan ESL contains mechanical moving parts that frequently fail with age.
When the lock fails:

• The ignition turns ON

• Dashboard lights appear

• The engine does not start

• Steering lock does not retract

The MK3 Emulator replaces the steering lock electronically and permanently bypasses ESL faults — eliminating the need for costly replacement or dealer programming.

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🛠️ Installation Instructions

1. Turn off the vehicle.

2. Remove the steering lock cover under the steering column.

3. Disconnect the original faulty ESL connector.

4. Connect the MK9578 Emulator to the vehicle harness.

5. Turn the ignition ON.

6. The LED will switch from RED → GREEN, and the lock-release sound will play.

7. Start the engine — the vehicle is now operational.

LED Behavior

• Green: ESL unlocked / start allowed

• Red: ESL locked

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🚗 Vehicle Compatibility

Nissan Models

Compatible Part Numbers

• 48700-1NC0A

• 48700-1NC1A

• 48700-1NC2A

• 48700-1NC3A