Mazda CX-5 2017–2019 — technical service bulletin
Bulletin SA-026-25 · NHTSA communication 11019161 · issued May 21, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2017–2019
model years
3
vehicle entries
Official summary
Instances of coolant leakage have been observed from the EGR bypass hose during maintenance. These issues are typically caused by improper assembly rather than defects in the parts themselves. The pipe includes a brazed R-section (see photo on bottom right). If the hose is installed by pressing it against this R-section, the clamp can shift upward, reducing clamping force and potentially leading to a coolant leak. This Service Alert outlines the correct procedure for assembling the EGR bypass hose and the inspection steps to follow when a coolant leak is detected.
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.