Your New Mazda SUV May Believe It's Fueled Up Even When the Tank is Empty | Carscoops

      Dealerships have been instructed to update the BCM with improved software to fix a fuel-related problem.

      Mazda is recalling nearly 105,000 CX-70 and CX-90 models due to incorrect fuel gauge readings. The issue is linked to a defect in the sending unit circuit board located within the sub-tank. The manufacturer has confirmed that all recalled SUVs may be subject to this gauge reading issue.

      If you're like me, you tend to postpone refueling until the estimated driving range falls dangerously low, believing there's still enough fuel to make it to the next gas station. However, if you own a Mazda CX-70 or CX-90 in the United States, it's best to avoid this habit, as a defect could cause the gauge to show fuel remaining even when the tank is empty.

      Mazda has announced a recall of 104,854 CX-70 and CX-90 vehicles. The company explains that ethylene-containing fuel can react with materials on the sending unit circuit board in the sub-tank. Over time, this reaction creates a soot buildup that disrupts the fuel gauge, resulting in inaccurate readings.

      Extent of the recall

      The CX-90 model is the most significantly impacted. A total of 88,798 CX-90s from the 2024 and 2025 model years produced between December 27, 2022, and April 25, 2025, have been recalled. Additionally, Mazda is recalling 16,056 2025 CX-70s manufactured between December 5, 2023, and April 25, 2025.

      Mazda reported that it received its first field complaint regarding a potential issue in August 2023, when one of its vehicles stalled despite the fuel gauge showing fuel was available in the tank. This prompted a thorough investigation that spanned more than 18 months across Canada and the US.

      The investigation's outcomes led Mazda to initiate a recall in late August of this year. While all recalled CX-70s and CX-90s might be at risk, the company stated that it has not recorded any incidents of crashes or injuries related to this defect.

      Starting November 1, owners will be informed about the recall. Dealers have been directed to reprogram the body control module with updated software at no charge, which Mazda claims will resolve the inaccurate fuel gauge readings.