Car Problem Reports

Mazda RX-8 Radiator Light Comes On

Mazda RX-8 Problem
15 Reports
Me Too

Model Years Affected: 2004, 2005, 2006, 2007, 2008, 2009

Average Mileage: 67,061 mi (24,400 mi - 119,000 mi)

  • kbbink9, , 69,700 mi

    I noticed about 50,000 miles the radiator light would flicker on and off. The engine temperature alwys stayed in the normal region and the radiator was full of fluid. The Mazda repair guy told me that this is accuring in a lot of the RX-8s. There is a plastic waffer on the gauge ball inside the radiator that measures the fluid. When the waffer starts breaking up, the gauge ball starts fluctuating greater sending a signal that the radiator is low on fluid. But it actually is not. Cost $900.00+ to replace the entire radiator just for this tiny plastic waffer.

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  • Visitor, , 38,000 mi

    Radiator light comes on in the summer when it's hot and the car is running over 60mph. Not fixed.

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  • Visitor, , 96,000 mi

    low water light comes on intermitantly, was told by dealer it was probably faulty sesor.

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  • Visitor, , 68,000 mi

    Dealer replaced radiator & hose.

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  • zumzum, , 119,000 mi

    I guess I had the car for two or three years the first time this occurred - maybe about 50,000mi. Had it to the (stupid) dealership couple times and they couldn't tell me what the problem was or if it was serious. Finally told me it was probably a sensor and told me what it would cost to replace it. I said wow! but replace it. They called and told me parts orders were backed up and it would be weeks before they could get part in. I told them forget it! Figured if it was a faulty sensor, the information was false anyway. Finally, when I was stranded at the mall with an overheated car, I took it to a reliable foreign car repair guy in town and he got the reservoir and repaired the car for me right away!
    Now at 119,000 the light is starting to go off and on again. I sure don't want to get stranded again, so guess I will call my guy and see about getting the SAME PROBLEM FIXED AGAIN. Seems like a poor design!

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  • Visitor, , 80,000 mi

    Radiator light comes on in hot weather. I blast the heat to cool it down and the light goes off.

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  • Visitor, , 24,400 mi

    light just started coming on and off. I will try replacing sensor.

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  • Visitor, , 52,000 mi

    radiator light stays on for no reason
    tire pressure light flashes for no reason

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