Mazda 3, BM/BN (EU)
Coolant capacity & service interval
Mazda 3, BM/BN (EU) coolant capacity ranges from 5,4 to 9,1 liters. Service intervals include checks at 40000 km/ 24 months and changes at 100000 km/ 60 months or 200000 km/ 120 months. The data covers 12 configurations.
The configuration chart below lists fill volumes and service intervals for each engine and trim variant.
| Type | Specifications |
|---|---|
| 3 1.6 (2017-2019) |
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| 3 1.6 (2017-2019) |
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| 3 SKYACTIV-D 1.5 (77 kW) (2015-2019) |
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| 3 SKYACTIV-D 1.5 (77 kW) (2015-2019) |
|
| 3 SKYACTIV-D 2.2 (110 kW) (2013-2019) |
|
| 3 SKYACTIV-D 2.2 (110 kW) (2013-2019) |
|
| 3 SKYACTIV-G 1.5 (74 kW) (2013-2019) |
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| 3 SKYACTIV-G 1.5 (74 kW) (2013-2019) |
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| 3 SKYACTIV-G 2.0 (121 kW) (2013-2019) |
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| 3 SKYACTIV-G 2.0 (121 kW) (2013-2019) |
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| 3 SKYACTIV-G 2.0 (88 kW) (2013-2019) |
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| 3 SKYACTIV-G 2.0 (88 kW) (2013-2019) |
|
Additional Notes
- Across all listed engine variants of the Mazda 3 BM/BN (EU), the coolant check interval is uniformly set at 40,000 km or 24 months, regardless of engine type or use condition.
- Every engine variant carries two distinct change intervals tied to use condition. Under normal use, coolant is changed at 100,000 km or 60 months. Under the first change only condition, the interval extends to 200,000 km or 120 months, reflecting a longer-life coolant fill applied at the factory or at an initial service.
- The 1.6 engine covering 2017-2019 has a cooling system capacity of 5.4-5.7 liters, placing it among the smaller-capacity systems in the lineup. A capacity range rather than a single fixed value is typical for cooling systems, accounting for minor variation in bleeding and fill procedures.
- The SKYACTIV-G 1.5 (74 kW) covering 2013-2019 carries a capacity of 5.6-6.0 liters, slightly above the 1.6 petrol despite the smaller displacement, which can reflect differences in engine architecture, cooling circuit routing, or heater core volume.
- Both SKYACTIV-G 2.0 variants, rated at 88 kW and 121 kW respectively and both covering 2013-2019, share an identical capacity range of 6.1-6.8 liters. The shared range indicates the same basic engine block and cooling circuit layout across the two power outputs.
- The SKYACTIV-D 1.5 (77 kW) covering 2015-2019 is the only variant in the specifications where transmission type affects coolant capacity. Manual transmission fitment corresponds to 6.9-7.0 liters, while automatic transmission fitment corresponds to 7.0-7.1 liters. The slight increase with automatic transmission is consistent with additional cooling circuit elements associated with automatic gearbox integration.
- The SKYACTIV-D 2.2 (110 kW) covering 2013-2019 holds the largest cooling system capacity in the specifications at 8.5-9.1 liters. The wide 0.6-liter spread within the range is also the broadest of any variant listed, which may reflect variation across body styles or equipment levels sharing the same powertrain.
- The diesel engines, SKYACTIV-D 1.5 and SKYACTIV-D 2.2, both require notably more coolant volume than the petrol variants. Diesel engines typically generate higher thermal loads and may incorporate additional cooling circuits for components such as exhaust gas recirculation coolers, contributing to the larger system volumes.