2008-2012 INFINITI EX35 ABS Module: AWD, Tech Package & Programming Guide
This guide covers the critical compatibility details, failure symptoms, and replacement requirements for the 2008-2012 INFINITI EX35 ABS control module.
- Compatibility is critical: The module must match your EX35's drivetrain (AWD) and whether it has the Technology Package (adaptive cruise control).
- Verify the part number on your original unit before buying a replacement. Common numbers include 47660-1BU5D and 47660-1UX8D.
- Replacement requires programming. A used module must be programmed to your vehicle's VIN and may need calibration by a professional shop.
- Driving with a failed ABS module is risky. Your standard brakes will work, but you lose anti-lock, traction control, and stability control safety features.
Symptoms of a Failing EX35 ABS Module
When the ABS control module in a 2008-2012 INFINITI EX35 begins to fail, it typically makes its presence known through a variety of dashboard warning lights and noticeable changes in brake behavior. Diagnosing the issue correctly is key to avoiding unnecessary replacement of other brake components like wheel speed sensors.
- ABS, VDC, and SLIP Lights On: The most common symptom is the illumination of the ABS, VDC (Vehicle Dynamic Control), and SLIP warning lights on your instrument cluster. These lights indicate that the self-diagnostic system has detected a fault, disabling these safety features.
- Unresponsive or Stiff Brake Pedal: You might notice the brake pedal feels harder to press or seems unresponsive, requiring more effort to slow the vehicle down.
- Wheels Locking Up Under Braking: With the ABS system disabled, the primary function of preventing wheel lock-up is lost. During a hard stop, especially on wet or slippery surfaces, one or more wheels may lock and skid.
- Associated OBD-II Codes: A proper diagnostic scan is essential. While a faulty module can sometimes throw misleading codes for wheel speed sensors, common codes directly related to module failure include internal failure codes or communication loss codes (like U0121). Forum discussions among owners also point towards codes like C1142 (Pressure Sensor Malfunction) as being linked to a faulty ABS pump assembly.
Warning: While some Infiniti models were subject to a safety recall for ABS actuators leaking brake fluid and creating a fire risk, the 2008-2012 EX35 was not specifically listed in the recall documents found (which primarily covered models like the QX60). However, the failure mode described—an internal fluid leak causing an electrical short—is a potential risk for any ABS actuator of this era.
Buying a Used ABS Control Module for Your 2008-2012 EX35
Purchasing a used OEM ABS module can save you a significant amount of money compared to a new unit from a dealership. However, for the INFINITI EX35, compatibility is extremely specific. Getting the wrong part will result in it not working. Here’s what you must verify before buying.
1. Drivetrain: All-Wheel Drive (AWD) vs. Rear-Wheel Drive (RWD)
The ABS control modules are different for AWD and RWD models. The initial vetted data confirms that many replacement units are specifically for All-Wheel Drive (AWD) models only. You must match the module to your vehicle's drivetrain. An RWD module will not work in an AWD vehicle, and vice-versa.
2. Technology Package: Adaptive Cruise Control
This is the most common mistake buyers make. The EX35 was available with a "Technology Package," which included features like Intelligent Cruise Control (Full Speed Range) and Intelligent Brake Assist (IBA). Vehicles with this package use a different ABS module than those without it. You must match the module to your vehicle's options.
- How to check for the Technology Package: Look at the buttons on the right side of your steering wheel. Vehicles with the Technology Package have extra buttons for managing the distance of the cruise control. You may also see an "IBA Off" switch on the dashboard to the lower left of the steering wheel. If you have these features, you need a module compatible with adaptive cruise. If not, you need the standard module.
3. Part Number Verification
The most reliable way to ensure compatibility is to match the OEM part number from your original module to the replacement unit. Clean the sticker on your existing module and read the number. Known part numbers for this vehicle generation include 47660-1BU5D, 47660-1UX8D, and 47660-1BA5A. Always confirm the part number on the unit you are buying matches your old one exactly.
4. Physical Inspection
When inspecting a used module, look for:
- No Corrosion: Check the aluminum block and the electrical connectors for any signs of white, crusty corrosion. Corrosion can indicate water intrusion and damage to the electronics.
- Intact Connectors: Ensure the plastic connector housings and all the pins inside are straight and undamaged.
- No Physical Damage: Look for cracks in the plastic housing of the electronic module or dents in the hydraulic pump body.
Programming and Installation Requirements
This is the most critical question for any electronic module replacement. For the 2008-2012 INFINITI EX35, a replacement ABS module—even a used OEM one—will likely require programming or calibration steps to function correctly with your specific vehicle.
- VIN Programming: Modern ABS modules are often tied to the vehicle's Vehicle Identification Number (VIN). A replacement module needs to be programmed with your car's VIN to communicate correctly with the engine computer, transmission computer, and other systems.
- Calibration Procedures: After installation, procedures like steering angle sensor calibration and zero point calibration may be necessary to ensure the VDC and traction control systems work accurately.
- Brake Bleeding: Replacing the hydraulic unit (the pump and valve block) requires a full brake system bleed. On these vehicles, a dealership-level scan tool (like the Infiniti CONSULT tool) or a high-end professional scan tool is often required to cycle the ABS pump to properly bleed all the air out of the new unit.
Pro Tip: While some online forums for older Infiniti models suggest programming isn't needed, it's a risky assumption for a component this critical. It's best practice to assume programming is required. Many independent repair shops with modern diagnostic tools can perform the necessary VIN programming and calibration, often for less than a dealership. Always confirm with your mechanic that they have the capability before starting the job.
Replacement Cost Comparison
The cost of replacing an ABS module can vary dramatically based on the type of part you choose.
| Part Type | Estimated Cost (Part Only) |
|---|---|
| New OEM (Dealership) | $1,000 - $2,500+ (if available) |
| New Aftermarket | $400 - $800 (Availability may be limited) |
| Used OEM | $100 - $300 |
| Remanufactured / Repaired | $200 - $500 |
| Shop Labor | $250 - $450 (Includes installation, bleeding, and programming) |
Frequently Asked Questions (FAQ)
Do I have to take my EX35 to an Infiniti dealer for ABS module replacement?
Not necessarily. While a dealer can certainly do the work, many qualified independent shops now have advanced scan tools capable of programming and calibrating a replacement ABS module to your vehicle's VIN. The key is to ask the shop beforehand if they have the equipment and experience with Nissan/Infiniti ABS systems.
Can I drive my EX35 with the ABS, VDC, and SLIP lights on?
You can, but with extreme caution. When these lights are on, your anti-lock braking, traction control, and stability control systems are disabled. Your standard brakes will still work, but your wheels can lock up during a panic stop, increasing the risk of skidding and loss of control, especially on slippery roads. It is highly recommended to get the system repaired as soon as possible.
What is the difference between the ABS module and the ABS pump?
The terms are often used interchangeably, but they are two parts of one assembly. The "ABS module" is the electronic computer that makes decisions. The "ABS pump" or "hydraulic unit" is the mechanical part with valves and a motor that controls brake fluid pressure. For the EX35, they are typically sold together as a single assembly, often called an "ABS actuator and ECU assembly."
My mechanic says the problem is a wheel speed sensor. How can I be sure it's not the module?
A faulty wheel speed sensor is a very common cause for the ABS light. A good diagnostic technician will not just read the code (e.g., "Right Front Wheel Speed Sensor Fault"), but will also use a scan tool to view the live data from all four wheel sensors as the car moves. If three sensors show a speed and one shows zero, the sensor is likely bad. If the module fails to communicate at all or shows erratic data from multiple sensors, the module itself is the more likely culprit.
Technical Specifications
OEM Part Numbers: 47660-1BU5D 47660-1UX8D 476601BA5A 476601BU5D 476601UX8D 47660-1UX5D 47660-1BD7B 47660-1BA5D
The part is an integrated unit containing the electronic control unit (ECU) and the hydraulic actuator/pump assembly.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- INFINITI EX35:
- 🛍️ Shop This Part
- Symptoms of a Failing EX35 ABS Module
- Buying a Used ABS Control Module for Your 2008-2012 EX35
- 1. Drivetrain: All-Wheel Drive (AWD) vs. Rear-Wheel Drive (RWD)
- 2. Technology Package: Adaptive Cruise Control
- 3. Part Number Verification
- 4. Physical Inspection
- Programming and Installation Requirements
- Replacement Cost Comparison
- Frequently Asked Questions (FAQ)
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