2013 INFINITI M37 ABS Control Module: Fitment, Programming, and Replacement Guide

Symptoms of a Failing 2013 M37 ABS Module

A failing ABS module can present several distinct warnings and symptoms. While a faulty wheel speed sensor can cause similar issues and is a more common and less expensive fix, a bad module will typically have its own set of indicators.

• ABS and VDC/Slip Lights On: The most common sign is the illumination of the 'ABS' and 'VDC OFF' or 'SLIP' warning lights on your instrument cluster.
• Unusual Braking Behavior: You might experience the brakes feeling unbalanced, grabbing unexpectedly, or pulsating randomly during normal driving.
• No ABS Activation: During a hard stop where the system should engage, you may find the wheels lock up and the car skids, indicating the ABS system failed to activate.
• Spongy or Unresponsive Brake Pedal: If the internal hydraulic unit (actuator) fails and leaks, it can introduce air into the brake lines, leading to a soft or spongy pedal feel.
• Diagnostic Trouble Codes (DTCs): A scan tool will likely show specific codes stored in the ABS module. A common code related to module communication is C1130 (Engine Signal), which often requires checking for engine-related codes first. Other codes may point to pump motor failure or internal electronic faults.

Known Issues, TSBs, and Recalls

While no specific ABS module recall was issued for the 2013 INFINITI M37 according to NHTSA data, INFINITI has issued recalls for other models around this time for a serious issue. In affected vehicles, an internal seal in the ABS actuator could leak brake fluid onto the electronic circuit board, creating a potential fire risk. The primary symptom of this leak is a constantly illuminated ABS warning light. If your ABS light is on, it is wise to have the vehicle inspected promptly.

A Technical Service Bulletin (TSB) exists for the diagnostic code C1130 (ENGINE SIGNAL). It advises technicians to diagnose and repair any engine-related fault codes (P-codes) before troubleshooting the ABS system, as an engine issue can sometimes trigger this specific ABS code.

Buying a Used ABS Control Module: A Buyer's Guide

Since new OEM modules for the 2013 M37 have been discontinued, the used market is your primary source for a replacement. Buying a used OEM part is often a better choice than a new aftermarket unit due to guaranteed factory fitment and electronics designed for your specific vehicle. However, careful verification is essential.

1. Verify Compatibility: The Most Critical Step

The 2013 M37 uses many different ABS modules depending on the vehicle's specific configuration. You MUST match the part number from your old module to the one you are buying. There are no exceptions. Key variations include:

• Drivetrain: Rear-Wheel Drive (RWD) vs. All-Wheel Drive (AWD)
• Adaptive Cruise Control: With or without Intelligent (Adaptive) Cruise Control
• Wheel Size: 18-inch vs. 20-inch wheels
• Trim Package: Base vs. Sport models

2. Physical Inspection

When you receive the used module, inspect it carefully:

• Check the Connector: Look for any signs of corrosion, bent pins, or damage to the electrical connector plug.
• Look for Leaks: Inspect the hydraulic block for any signs of brake fluid residue, which could indicate a failing internal seal.
• Examine the Casing: Check for cracks or damage to the plastic electronic module housing, which could suggest water intrusion or physical impact.

3. Why Used OEM is a Smart Choice

For a complex electronic part like this, a used OEM module from a reputable seller is generally preferable to a new, unbranded aftermarket part. The OEM unit was designed and tested by INFINITI to work seamlessly with your car's other systems. Aftermarket modules can sometimes have software or communication issues that are difficult to diagnose.

Programming and Calibration Requirements

After replacing the ABS module, the system requires a 'calibration of the deceleration G sensor'. This procedure synchronizes the new module with the vehicle's sensors. Without this step, the ABS light will remain on, and the brakes may behave erratically.

• Required Tool: This calibration must be performed using the official Nissan/INFINITI CONSULT diagnostic tool.
• Who Can Do It: An INFINITI or Nissan dealership service center will have this tool. Some high-end independent shops specializing in Japanese vehicles may also have a compatible scan tool, but you should confirm this beforehand.
• DIY Feasibility: While a skilled DIY mechanic can physically swap the module, the final calibration step requires a trip to a professional with the right equipment.

Replacement Overview

Replacing the module is a moderately difficult job that involves working with brake fluid, which is corrosive to paint. The module is located on the driver's side of the engine bay near the firewall. The basic steps involve:

1. Disconnecting the battery and the ABS module electrical connector.
2. Draining the brake fluid from the system to minimize spillage.
3. Carefully disconnecting the multiple hard brake lines using flare nut wrenches to avoid stripping the fittings.
4. Unbolting and removing the entire ABS pump and module assembly.
5. Installing the new assembly, reconnecting all lines and the electrical plug.
6. Refilling the system with fresh brake fluid and performing a thorough brake bleed procedure.
7. Having the Deceleration G-Sensor calibrated by a professional.

Cost Comparison

Here is an estimated cost breakdown for replacing the 2013 M37 ABS module. Prices can vary based on your location and the specific part condition.

Frequently Asked Questions (FAQ)