Mazda mx5 Owner's Manual page 43

X = ISOFIX position not suitable for ISOFIX child-restraint systems in this mass group and/or this size class.
(Except Europe)
Regarding child-restraint systems which can be installed to your Mazda, consult an expert repairer, we recommend
an Authorised Mazda Repairer.
i-Size child-restraint systems
An i-Size child-restraint system can be installed to the specifi ed seat as follows:
i-Size child-restraint systems
Key of letters to be inserted in the above table:
X = Seating position not suitable for i-Size "universal" child-restraint systems.
NOTE
An i-Size child-restraint system refers to a child-restraint system which has acquired
i-Size category certifi cation for the UNECE 129 regulation.
Essential Safety Equipment
Child Restraint
Passenger seat
X
2–27