Mazda

Mazda3 BM / BN inspection checklist

2013-2019 · 6 things to check before you buy, taken from this car's known problems.

All engines

highTakata passenger airbag recall (REC-005733)

Look for: Mazda3 BM/BN (and CX-3) 2013-2020 are covered by the Takata recall - the passenger airbag inflator propellant can degrade with moisture absorption and rupture abnormally in a crash, risking injury or death.

If you find it: Free inflator replacement at an authorised Mazda dealer; verify the recall has been completed before purchase via VIN.

Any · ~$0 (recall)

2.2L SkyActiv-D turbo diesel (XD)

highDPF clogging and oil dilution

Look for: The SkyActiv-D injects post-combustion fuel to burn off the DPF; on short stop-start trips regens fail to complete, fuel washes past the rings into the sump and the oil level rises and dilutes. Repeated incomplete regens can clog the DPF and accelerate engine wear. A common, well-documented SkyActiv diesel issue across the 3, 6 and CX-5.

If you find it: Regular highway driving to allow full regens; never switch off mid-regen; monitor oil level and change oil on time; DPF clean or replacement if clogged.

Any (urban use) · ~$500-3500

highCarbon build-up / intake-shutter-valve recall

Look for: Carbon deposits accumulate in the intake and on the intake shutter valve, and some early engines suffered camshaft/oil-contamination problems. Mazda Australia issued a 9 October 2019 safety recall covering carbon accumulation in the engine intake shutter valve on diesel 3/6/CX-5 that could cause premature wear, loss of power and loss of vehicle control.

If you find it: Confirm the 2019 recall work is completed; intake/EGR decarbon as needed; full diesel-specialist inspection pre-purchase.

From 60k+ km · ~$500-3000

mediumInjector and turbo issues at higher km

Look for: Common-rail injectors can wear and the twin-turbo system can suffer from oil-flow or carbon-related faults, causing rough running, smoke and hard starting.

If you find it: Injector test/replacement and turbo inspection by a diesel specialist; use quality fuel and keep oil changes on schedule.

From 120k+ km · ~$1500-4000

2 of 3 engines

mediumIntake-valve carbon build-up (direct injection)

Look for: Like all direct-injection SkyActiv-G engines, fuel is sprayed straight into the cylinder so it never washes the back of the intake valves. PCV blow-by leaves oily deposits that bake into carbon, eventually causing rough idle, misfires (P0300-series codes) and lost economy. A 2019 Australian recall addressed carbon accumulation in the intake shutter valve that could affect engine performance.

If you find it: Walnut-blast or chemical clean of intake valves at higher km; replace/check the PCV valve; confirm the 2019 intake-shutter-valve recall work is done.

From 80k+ km · ~$400-1200

mediumClutch shudder (manual)

Look for: Manual SkyActiv cars are prone to clutch shudder/judder on take-off, related to clutch friction material and disc behaviour - often felt early in the car's life.

If you find it: Updated clutch components under warranty where eligible; otherwise clutch assembly replacement by a specialist.

From 20k-80k km · ~$1200-2200

4 minor things (low severity)

lowFront clutch/brake auto-hold and SCBS quirks

Look for: The low-speed Smart City Brake Support and i-stop/auto-hold systems can throw warning lights or false activations, often from dirty sensors or low battery voltage rather than a real fault.

If you find it: Clean the SCBS sensor/window, check and replace the battery if weak, clear codes; software update if needed.

Any · ~$0-400

lowRoad noise and interior rattles

Look for: A known weak point of the BM/BN is coarse-surface road noise and the occasional dash/door-trim rattle as the car ages.

If you find it: Sound-deadening can help road noise; locate and re-clip trim for rattles - mostly cosmetic.

Any · ~$0-300

lowFront suspension/bush wear and tyre wear

Look for: Front lower control-arm bushes and links wear with km, giving clunks over bumps; the firm setup and front-drive layout can also chew front tyres.

If you find it: Replace worn bushes/links, do a wheel alignment and rotate tyres regularly.

From 80k+ km · ~$300-900

lowMZD Connect infotainment glitches / slow boot

Look for: The MZD Connect head unit can become sluggish, freeze, lose the reversing camera or behave erratically as it ages; a failed display is expensive out of warranty.

If you find it: Software/firmware update at a dealer first; commander-knob or display unit replacement if hardware has failed.

Any · ~$0-1200

From FlamingCars' Mazda Mazda3 guide. It's a checklist of known problems, not a replacement for a professional pre-purchase inspection. Your ticks are kept in this browser only.