Mazda CX-3 Fuse Box Replacement Parts

The Mazda CX-3 was produced as a single generation running from 2015 to 2023, with a facelift introduced around 2018, so there is one main architectural split to be aware of. Fuse boxes often share the same basic housing across a generation, but the wiring configurations and relay layouts can differ between pre-facelift (2015–2018) and post-facelift (2018–2023) cars depending on what electrical features were added. You should give the breaker your exact registration so they can match the correct unit rather than assuming any CX-3 fuse box will drop straight in.

Trim level alone does not change the fundamental fuse box, but it can affect what circuits are populated within it — for example, a higher trim like the GT Sport may have additional fused circuits for heated seats, a Bose audio system or other features not present on a base SE-L. The physical unit may look identical but have different relay and fuse assignments inside. Always confirm with the breaker against your registration rather than assuming a fuse box from a lower or higher trim is a straightforward swap.

Engine size can influence fuse box configuration because different engines have different power demands, starter motor ratings and ancillary circuits. While the CX-3 was offered with both 1.5 and 2.0 petrol engines as well as a 1.5 diesel, the fuse box for each variant may differ in relay ratings and fused circuit layout even if the housing looks the same. Confirm with the breaker using both your registration and the donor car's registration before purchasing.

Yes, this can matter — the AWD (i-ACTIV AWD) variants of the CX-3 have additional drivetrain components such as the rear differential coupling system, which requires its own control circuits and fusing. A fuse box from a 2WD car may therefore differ from one fitted to an AWD car. Make sure you tell the breaker whether your car is 2WD or AWD so they can source the correct unit.

The 2018 facelift brought updates to the CX-3's infotainment, driver assistance systems and interior electronics, which means the fuse box configurations across that boundary may differ. While the housing could be physically similar, the internal circuit assignments are likely different enough to cause problems if crossed. This is exactly the kind of cross-boundary question to route to the breaker with both registrations confirmed.

Findapart lets you request quotes from UK-based vehicle breakers who dismantle Mazda CX-3s and can supply the correct fuse box for your specific variant. When you submit your enquiry, include your full registration number and mention whether your car is 2WD or AWD, as breakers will use this to match the right unit. A reputable breaker will check the donor car's spec against yours before confirming compatibility.