2009 Mazda RX-8 Problems
RepairPal has identified the most common problems with the 2009 Mazda RX-8 based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
If the climate control's heat/cold knob is not adjusting to the desired temperature, a new climate control unit may be needed.
Mazda has issued Bulletin No. 01-010/10 for the above issue:
Some vehicles may experience the coolant level warning light comes on even though the correct amount of coolant is in the coolant reserve tank and radiator. The coolant level sensor float in the coolant reserve tank (A) is deteriorated and absorbs coolant. The float gets heavy, and sinks, causing the the coolant level warning light comes on. As a mass-production change, the design of the float has been modified.
Replace the necessary parts according to this VIN range.
• For VINs JM1FE****** 100000 to 157837 (built before July 1, 2005), replace the tank with sensor.
• For VINs JM1FE****** 157838 to 403405 (built on or after July 1, 2005), replace the tank only.
Some models may have a problem where the Check Engine light illuminates indicating an improperly tightened fuel cap. Due to improperly manufactured threads on the fuel filler pipe, the filler pipe may need to be replaced.
Be sure to check your owner's manual and use the correct engine oil. Mazda does not recommend using synthetic oil in the RX-8's rotary engine.