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Overflow Tanks & Caps
Overflow Bottles & Caps
Sort by:Recommended
86-87 Rx7 Radiator Overflow Bottle (N326-15-350A)
Fits 86 and early 87 models, this changed in mid 1987 to a different bottle in a different location.
93-95 Rx7 Radiator Overflow Bottle (N3A1-15-350B)
93-95 Radiator
Overflow Bottle Comes with a new cap.
Fits LHD and RHD
04-11 Rx8 Radiator Overflow Tank (N3H1-15-351H)
Includes Water Level Sensor. but without cap.
Getting a coolant light to come on when your coolant is full? This is the culprit.
Mazda in its infinite wisdom doesn't sell the coolant level sensor by itself, you must buy this tank to get it.
81-85 12A Rx7 Overflow Bottle Cap (1052-15-355A)
These are no longer available, when you order this we will send you a modified cap that is nearly identical from another Mazda vehicle.
Fits 81-85 Mazda Rx7s with 12A engines, does not fit the 84-85 13B Rx7s.
The cap for the 84-85 13B is no longer available.
04-08 Rx8 Radiator Overflow Bottle Rubber Mount Grommet (LFG1-15-202)
One of these to mount the expansion tank on 04-08 Mazda Rx8s.