2024-2025 CX-90 & CX-70 Rear HVAC Control Panel Guide

Part Identification: More Than Just Trim

The part numbers KMV66132XA and KMV66132XB refer specifically to the rear HVAC (Heating, Ventilation, and Air Conditioning) control panel located on the back of the center console for passengers in the second row. It is described in Mazda catalogs as 'Electrical components, type 3'. This is not the main front console trim around the gear selector or the commander knob. The part number KMV66132XB is a direct replacement for the earlier KMV66132XA, indicating a revision, though the specific changes are not publicly documented. For compatibility, it is always best to match the part number from your original unit.

Symptoms of Failure

Since the CX-90 and CX-70 are new models, long-term failure patterns have not yet emerged. However, issues with this type of electronic control panel are typically straightforward. Failure can be categorized as either electrical or physical damage.

• Unresponsive Controls: Buttons for temperature or fan speed do not respond when pressed.
• No Power: The panel is completely dark and non-functional. This could be a fuse issue or a failure within the unit itself.
• Erratic Behavior: The rear climate control turns on or off by itself, or settings change without input.
• Physical Damage: Cracked screen, broken buttons, or deep scratches that affect functionality. This is the most likely issue you'll find on a used part, often from the donor vehicle being in an accident or from improper removal.

Known Issues, TSBs, and Recalls

As of mid-2024, there are no specific recalls or Technical Service Bulletins (TSBs) from Mazda that directly name the rear HVAC control panel (KMV6-61-32XB). However, the 2024-2025 CX-90 and 2025 CX-70 have been subject to several software-related recalls affecting various electronic modules.

One significant recall (NHTSA Campaign Number: 24V814000 / Mazda Recall 7124J) involves the Dash Electrical Supply Unit (ESU) which can cause issues with the defroster, 360° view monitor, and other systems at startup. While this doesn't directly implicate the rear HVAC panel, it highlights the sensitivity of the vehicle's electronic systems. It is crucial to ensure any new or used vehicle has had all applicable recall software updates performed by a Mazda dealer to ensure proper function of all modules.

Owners on forums have noted various electronic glitches and interior rattles on these new models, but widespread failure of the rear HVAC panel has not been a common complaint. Some users have complained about the overall design and small storage capacity of the center console, but this is a design characteristic rather than a part failure.

Buying a Used Rear HVAC Control Panel

Purchasing a used OEM rear HVAC panel can be a smart way to save money, especially since these parts are electronic and can be expensive new. Given the newness of the CX-70 and CX-90, any used part will have come from a very low-mileage vehicle. Here’s what to look for:

• Verify the Part Number: Insist on getting a clear photo of the sticker on the back of the unit. Ensure it matches KMV66132XA or, preferably, the updated KMV66132XB.
• Inspect for Physical Damage: Look closely at all photos for cracks, deep scratches, or damage to the buttons. Pay special attention to the mounting tabs on the back; if they are broken, the panel may not sit securely and could rattle.
• Check the Connectors: Examine the electrical connector socket on the back of the unit. Look for any bent or corroded pins, or signs of heat damage (discoloration).
• Ask About the Donor Vehicle: Ask the seller if they know the history of the car it came from. Avoid parts from flood-damaged vehicles, as water can cause hidden, long-term electronic problems.
• Warranty/Return Policy: Only buy from sellers who offer a warranty and a clear return policy. This gives you protection in case the part is dead on arrival.

Replacement Information

Replacing the rear HVAC control panel is generally considered a straightforward task for a DIYer with the right tools.

• Difficulty: 2 out of 5
• Tools Required: Plastic trim removal tools, possibly a small screwdriver.
• Procedure: The panel is typically held in by clips. You will need to use plastic pry tools to carefully release the clips without damaging the surrounding console trim. Start by prying gently around the edges of the panel. Once it's loose, disconnect the single electrical harness on the back, then connect the new unit and snap it into place.

Frequently Asked Questions