2013 INFINITI JX35 Front Seat: OCS Airbag Faults, Cooled Seat Failures, and Replacement Guide

Critical Safety Recalls and Technical Service Bulletins (TSBs)

Before diagnosing any issue with your 2013 JX35's front seat, it is essential to be aware of several official recalls and service bulletins, particularly concerning the front passenger seat's airbag system.

Occupant Classification System (OCS) Recalls

Infiniti issued a voluntary safety recall (NHTSA Campaign ID: 16V244000, Infiniti ID: PC217) because the OCS could misclassify an adult as a child or fail to detect them at all, deactivating the airbag. Symptoms include the passenger airbag status light showing "OFF" even when an adult is seated. Dealers were instructed to replace the OCS sensors or update the system software free of charge. Even if your vehicle has had recall work done, a separate TSB (ITB17-016b) exists for customers who still experience issues, which involves a further OCS retrofit.

Before purchasing a used passenger seat, it is crucial to verify if the OCS recall has been performed on the donor vehicle or to assume it will need to be inspected by a dealer.

TSB for Inoperative Climate Controlled Seats

Infiniti released Technical Service Bulletin ITB20-004 for 2013 JX35 models where the heated and cooled seat functions are inoperative. This is often caused by a faulty climate controlled seat control unit or its harness connector located under the seat. The official repair procedure involves replacing both the control unit and the connector, and even requires drilling a new mounting hole in the seat frame.

Common Symptoms of a Failing Front Seat

Beyond the specific TSBs, JX35 front seats can exhibit several common failures.

• Heated/Cooled Seats Not Working: The most common symptom, often linked to the control module failure described in TSB ITB20-004. The indicator light on the switch may or may not illuminate.
• Power Seat Won't Move: If the seat doesn't move in one or any direction, the cause could be a failed power seat switch, a bad motor, or an issue with the wiring. Sometimes a motor gets stuck and can be temporarily freed by tapping on it with a small hammer.
• Grinding Noise When Adjusting: A grinding or clicking sound when you try to move the seat, but the seat doesn't move correctly, often points to a stripped plastic gear inside the seat track motor assembly.
• Airbag Warning Light On: An illuminated airbag light on the dashboard can be caused by a fault in the passenger OCS sensor, a bad connection under the seat, or an issue with the seat's side airbag. This is a critical safety failure.
• Seat Memory Malfunction: The seat fails to move to the preset memory position. This can sometimes be resolved by resetting the module, which involves disconnecting the main seat connector for several minutes.

Buying a Used 2013 JX35 Front Seat: A Step-by-Step Checklist

Purchasing a used front seat for the JX35 requires careful verification. Due to the numerous options, getting the wrong seat is a common and costly mistake. Use this checklist to ensure compatibility.

Step 1: Identify Your Vehicle's Exact Features

Before you shop, look at your current seat's controls and features. You must match them exactly:

• Driver or Passenger: They are not interchangeable.
• Power Adjustments & Memory: Does the driver's seat have memory buttons (typically on the door panel)? Passenger seats are typically power-adjustable but do not have a memory package.
• Climate Control: Check your center console for the climate seat control knobs. Do you have heated-only seats or heated AND cooled (climate-controlled) seats? A seat with cooling will have a blower unit underneath. A seat without it will not have the correct wiring or components.
• Headrest Monitor: Is your JX35 equipped with the rear seat entertainment package? If so, the back of your front seat will have a monitor built into the headrest area. A replacement seat must have this and the corresponding wiring.

Step 2: Verify the Interior Color Code

The 2013 JX35 was available with three primary interior leather colors. Do not rely on photos alone, as lighting can be deceptive. The color names are:

• Graphite (Black)
• Java (Brown)
• Wheat (Beige)

Your vehicle's interior color code can be found on the identification plate located in the driver's side door jamb.

Step 3: Inspect the Used Seat Before Purchase

When possible, inspect the used seat in person or request detailed photos from the seller.

• Check the Leather: Look for rips, tears, deep cracks, or heavy wear, especially on the driver's side outer bolster.
• Inspect the Foam: Press on the seat cushion. It should feel firm and supportive. Collapsed or worn-out foam will be uncomfortable.
• Examine the Frame: Check for any signs of rust or damage to the seat frame and tracks.
• MATCH THE CONNECTORS: This is the most important step. Ask for clear photos of all the electrical connectors on the bottom of the seat. Compare them meticulously to the connectors on your original seat. The number, shape, and color of the plugs must match perfectly to ensure all functions and safety systems will work.

Front Seat Replacement Guide

Replacing the front seat is a straightforward job, but requires care due to the integrated airbag system.

Step-by-Step Removal and Installation

1. Record Settings: Write down your radio presets and any other custom settings, as they will be lost.

2. CRITICAL: Disconnect Battery. Disconnect the negative battery terminal and wait at least 3-5 minutes before proceeding. This is mandatory to de-energize the airbag system and prevent accidental deployment.

3. Unbolt the Seat: Slide the seat forward to access the two rear bolts and slide it backward to access the two front bolts. Remove all four bolts holding the seat to the floor.
4. Tilt and Disconnect: Carefully tilt the seat backward to access the electrical connectors underneath. There will be several plugs for power, airbags (usually yellow), heating/cooling, and memory. Release the harness clips and disconnect all of them.
5. Remove the Seat: Lift the seat out of the vehicle. It is heavy and bulky, so a second person may be helpful to avoid scratching interior trim.
6. Installation: Installation is the reverse of removal. Place the new seat in the vehicle, reconnect all electrical connectors, and bolt it to the floor. Torque the four seat bolts to 35 ft-lbs (48 N-m).
7. Final Steps: Reconnect the battery. Turn the ignition ON and check for proper function of all power seat controls. Crucially, watch the airbag warning light on the dash. It should illuminate for about 7 seconds and then turn off. If it stays on or flashes, there is a fault in the system that requires professional diagnosis. If the passenger seat was replaced, a "Zero Point Reset" for the OCS may be required by a dealer or a capable scan tool.

Cost of a 2013 JX35 Front Seat

The cost can vary dramatically depending on the source and condition.

Frequently Asked Questions (FAQ)