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Rx7
Mazda Rx7 Thermostat Housings & Necks
Sort by:Recommended
89-91 Rx7 Thermostat Housing Cover (N350-15-172)
89-91 Turbo & N/A Thermostat Neck
Over time this item will start to crack and fall apart.
This would also be a good time to change the thermostat & O-Ring.
86-88 Rx7 Radiator Fill Cap with Body (N326-15-17YA)
86-88 Radiator Fill Cap with Body
Goes on thermostat neck.
Don't forget the o-ring.
Will interchange with the later aluminum 93-95 Rx7 Thermostat Housing Base if you dont want the nipple.
86-88 Rx7 Turbo & Automatic Thermostat Housing Cover (N318-15-172A)
86-88 Turbo & Automatic Thermostat Housing Neck
81-85 12A Rx7 Thermostat Housing (8872-15-170A)
Fits all 12A engines from 1981-1985.
The 74-85 Thermostat Housing (1757-15-172) will work in its place though.
93-95 Rx7 Manual Thermostat Housing Cover (N3A1-15-170A)
Fits all 93-95 Mazda Rx7s with manual transmissions.
This part was superseded to not include the neck that the cap screws onto. The cap now screws directly onto this housing. The earlier part required a bolted on neck.86-88 N/A Manual Trans Rx7 Refurbished Thermostat Housing (N326-15-172B) - NLA
Out of stockThese are no longer available from Mazda, however the N318-15-172A thermostat housing cover will work in its place if you plug the passage on it.
86-88 & 93-95 Rx7 Thermostat Housing Cap (KF01-15-205)
Fits:
- 86-88 Mazda Rx7 (Turbo & Non-Turbo)
- 93-95 Mazda Rx7
93-95 Rx7 Thermostat Housing Cap Base (N3C1-15-175)
Fits all 93-95 Mazda Rx7s where applicable.
The thermostat housing was superseded to not need this part by the cap screwing directly onto the housing, but if you have the original/earlier housing, you will need this part.
You will also need this o-ring and cap.Will interchange with the earlier 86-88 Rx7 Cap and thermostat housing body if you want one with a nipple.
86-88 Rx7 Thermostat Housing Neck Cap (K817-15-205)
Fits turbo and non-turbo 86-88 Mazda Rx7s.
Will also fit the 93-95 Mazda Rx7s.
74-85 Rx7 OEM Thermostat Housing Cover (1757-15-172A)
These are No Longer Available from Mazda, but we have started to make them, you can purchase them here.
Fits all rotary cars from 74-85.
We just found a box of these at our place, they are now back in stock if you prefer an OEM unit.
74-85 Rx7 Atkins Thermostat Housing Cover (1757-15-172A-ARE)
These are no longer available from Mazda, so we are now making them.
Don't forget the thermostat housing bolts.
86-88 Rx7 Thermostat Housing Bolt (9980-10-840)
Fits turbo and non-turbo Mazda Rx7 thermostat housings.
These are no longer available from Mazda, but we have sourced them aftermarket.
Same as 9980-10-838.
89-91 Rx7 Aluminum Thermostat Housing (N350-15-172-ARE)
We are making these out of aluminum to replace the stock plastic version which can break easily.