2018 Nissan Murano Body Control Module: Programming, Failures, and Replacement

Symptoms of a Failing 2018 Murano BCM

A failing Body Control Module can be difficult to diagnose because the symptoms are often random and can mimic other problems. Instead of one specific failure, you'll likely notice a pattern of strange electrical issues. 🎬 Watch: Top 7 symptoms of a bad body control module Common signs include:

• Erratic Lights: Headlights, taillights, or interior lights may flicker, stay on, or not turn on at all.
• Power Window and Lock Malfunctions: Windows may not open or close, or door locks may behave erratically or fail to respond to the key fob or interior switches.
• Key Fob and Security Problems: The vehicle may not recognize the key fob, the push-button start may not work, or the security alarm might trigger for no reason. A TSB for the 2018 Murano notes that if the mechanical key is used to unlock the door, the alarm will sound because the BCM does not recognize the key's operation.
• Parasitic Battery Drain: A faulty BCM can fail to shut down certain systems, causing the battery to drain overnight or when the vehicle is parked.
• Dashboard Warning Lights: You may see multiple, unrelated warning lights for systems like ABS, airbags, or traction control, even if the systems themselves are working fine.
• Communication Errors: A common sign of BCM failure is a communication error code, such as U1000, when a mechanic scans the vehicle's computer system.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While there are no specific recalls for the BCM itself on the 2018 Murano, it's important to be aware of related issues. Water intrusion is a common cause of BCM failure, and some owners have reported issues with water leaks from the panoramic sunroof, which can expose wiring and modules to moisture. Additionally, there are several TSBs related to BCM software and the systems it controls:

• NTB18-071C: This bulletin explains that on Murano models built after April 13, 2018, the BCM is not equipped with software to recognize the mechanical key being used in the door lock. This means using the physical key to unlock the door will trigger the alarm, which is considered normal operation.
• NTB17-127B: Addresses issues where the Intelligent Key initialization procedure fails or stops, which can be related to BCM communication.

There was also a significant recall (NHTSA #18V-601) for the ABS actuator on 2015-2017 Muranos, which could leak brake fluid onto its circuit board. While this is a separate module, widespread electrical issues should always be diagnosed thoroughly to rule out other potential faults.

BCM Programming and Configuration

This is the most critical part of replacing the BCM. It is not a simple plug-and-play part. The new module, whether it is brand new or a used OEM part, must be electronically synchronized with your vehicle's other computers and keys. This process involves:

1. Installation: The BCM is located behind the instrument cluster on the driver's side 🎬 See this walkthrough on how to remove the instrument cluster of the dashboard.
2. Programming/Configuration: A technician must use a compatible diagnostic tool, like the Nissan CONSULT-III, to perform several steps. This includes writing the vehicle's VIN to the BCM and configuring it for the specific options your Murano has (e.g., sunroof, premium audio, etc.).
3. Key Synchronization: All existing keys must be re-registered to the new BCM. This is part of the Nissan Anti-Theft System (NATS). 🎬 Watch: How to code the BCM and program your keys If this is not done, the car will not start.

While some advanced aftermarket scan tools claim to perform these functions, success is not guaranteed. The most reliable method is to have the work done by a Nissan dealership or a qualified independent shop that has a subscription to Nissan's diagnostic software.

Buying a Used 2018 Murano Body Control Module

A used OEM BCM can be a cost-effective solution, but careful purchasing is key. Since programming is required regardless, a reliable used part can offer the same performance as a new one for a fraction of the price.

Part Number Verification

Always match the part number on your original BCM exactly. The verified OEM part number for the 2018 Nissan Murano is 277609UE0A. While other part numbers may exist for different trim levels or production dates, you must ensure the replacement module's number matches the one you are removing.

What to Inspect

• Connectors: Check the pins on the electrical connectors for any signs of corrosion (green or white powder), which indicates water damage. Do not purchase a module with corroded pins.
• Case: Inspect the plastic casing for any signs of being opened, cracks, or heat damage.
• Source Vehicle: If possible, know the history of the vehicle the part came from. A part from a low-mileage vehicle involved in a collision is often a better bet than one from a high-mileage car with unknown electrical issues.

Replacement Cost Breakdown

The cost to replace a BCM can vary significantly based on the price of the part and labor for installation and programming.

Note: Prices are estimates and can vary based on location and supplier. Programming is a required additional cost.

Frequently Asked Questions (FAQ)