Diesel Exhaust Fluid (DEF) Replenishment
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Use a Mazda genuine product or a product conforming to ISO22241-1 for DEF. If incompatible DEF is used, the Selective Catalytic Reduction (SCR) system may not operate normally. For the recommended DEF, consult the nearest Authorized Mazda Dealer.
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Do not dilute DEF with water. If diluted DEF is used, it could cause a problem with the SCR system or damage it.
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Do not add any fluid other than DEF to the urea tank. If any fluid other than DEF is added, it could cause a problem with the SCR system or damage it. Do not switch the ignition ON, and contact an Authorized Mazda Dealer.
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When adding DEF, use a bottle with an anti-spill nozzle. If a bottle without an anti-spill nozzle or a commercial dispenser at a gasoline station is used, it could cause leakage or the DEF to spray out.
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Do not overfill the DEF. If the DEF is overfilled, it may freeze during cold temperatures (–11°C (12 °F) or less). When urea freezes, it expands and could cause tank breakage. Always use a bottle with an auto-stop function and stop adding fluid when the auto-stop function operates.
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When adding DEF during low temperatures (–11 °C (12 °F) or less), move the vehicle to a warm location. If the DEF starts to freeze, it may not flow correctly and the correct amount may not have been added. In addition, if the fluid freezes in the urea tank, you may not be able to tell if the correct amount of fluid was added.
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Replenishment of DEF by an Authorized Mazda Dealer is recommended. If you want to replenish the DEF yourself, follow the replenishment procedure below.
Replenishment Procedure
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Check the remaining amount of Diesel Exhaust Fluid (DEF) on the multi-information display.
(Instrument cluster (Type A))
Refer to Remaining Diesel Exhaust Fluid (DEF) and Maximum Driving Distance Display (SKYACTIV-D 2.2) (Search).
(Instrument cluster (Type B))
Refer to Remaining Diesel Exhaust Fluid (DEF) and Maximum Driving Distance Display (SKYACTIV-D 2.2) (Search).
3.8 L (1.0 US gal, 0.84 Imp gal) of DEF or more needs to be added.
The replenishment amount (reference) according to the DEF level (%) indication is as follows:
Percentage (%) indication for remaining amount
Reference replenishment amount*1
100 — 85
Replenishment unnecessary
80 — 60
About 3.8 L (1.0 US gal, 0.84 Imp gal)
55 — 40
About 5.7 L (1.5 US gal, 1.3 Imp gal)
35 — 20
About 7.6 L (2.0 US gal, 1.7 Imp gal)
15 — 0
About 9.5 L (2.5 US gal, 2.1 Imp gal)
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Even if DEF is added at the indicated replenishment amount, 100 % may not be indicated on the display.
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Stop the vehicle on level ground.
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Switch the ignition OFF.
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Open the fuel-filler lid.
Refer to Refueling (Search).
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Open the cap of the DEF filler port.
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Remove the cap of a bottle containing DEF, insert the bottle into the DEF filler port, and screw it in lightly until it stops.
If too much DEF is added, the SCR system might display a warning. Contact an Authorized Mazda Dealer if a warning is displayed. If the warning remains displayed, the urea tank may have a problem or it may be damaged.
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If excessive force is applied when pressing in the bottom of the bottle, the bottle or the DEF filler port may be damaged.
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When the urea tank is full, stop adding DEF because the flow from the bottle slows down by the bottle's auto-stop function. If you continue adding DEF, the urea tank will overfill.
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Press in the bottom of the bottle straight and add DEF.
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Remove the bottle in the reverse order of the insertion. At this time, be careful of DEF dripping from the bottle.
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Tighten the cap of the DEF filler port until you hear two or more click sounds.
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Switch the ignition ON once.
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Check the following while the vehicle is stopped.
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No DEF level warning indication is displayed on the multi-information display.
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The DEF level (%) indication on the multi-information display shows an increase.
(Instrument cluster (Type A))
Refer to Remaining Diesel Exhaust Fluid (DEF) and Maximum Driving Distance Display (SKYACTIV-D 2.2) (Search).
(Instrument cluster (Type B))
Refer to Remaining Diesel Exhaust Fluid (DEF) and Maximum Driving Distance Display (SKYACTIV-D 2.2) (Search).
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Switch the ignition OFF.
If the above indications remain unchanged even after one minute has passed with the vehicle stopped:
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If you have already added 3.8 L (1.0 US gal, 0.84 Imp gal) of DEF according to the DEF level (%) indication on the multi-information display, prepare an additional 3.8 L (1.0 US gal, 0.84 Imp gal) of DEF or more and add it following the replenishment procedure.
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If you added the correct amount of DEF, the DEF level (%) indication on the multi-information display will show an increase while the vehicle is being driven. If the DEF level (%) shows no increase or the speed restriction does not cancel even while driving the vehicle, consult an Authorized Mazda Dealer.
