Mazda CX-70 2024–2026 — technical service bulletin
Bulletin 01-005-26 · NHTSA communication 11029225 · issued Feb 26, 2026
Technical service bulletin
communication type
Engine
component
2024–2026
model years
10
vehicle entries
Official summary
Some vehicles may exhibit green residue (yellow circle) on the outer surface of the coolant reserve tank, which appears to be coolant blowback. This is caused by coolant seeping out and appearing as leakage from small pores (slight gaps) formed due to the deterioration of the coolant reserve tank (sub) material. To eliminate this concern, the material of the coolant reserve tank (sub) will be modified.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.