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Mazda CX-5 KE common problems: what to check before you buy

Credov's researched list of the 3 faults the Mazda CX-5 KE is known for (2012–2017), 3 of them serious or costly. Each one says what to look for when you check the car, so you can spot it before you buy. Not every car has these faults: they are the ones worth checking on this model.

Known problems on the Mazda CX-5 KE

Diesel brake vacuum pump wears out

Safety risk

2012–2017 · SH-VPTS · diesel · Brakes

What to look for: With the engine off, pump the brake pedal firm, hold it, then start the engine and feel for the pedal sinking slightly.

Why it matters: Reduced brake assist means a harder pedal and longer stopping distances with no warning light, so the simple pedal-sink test at start-up is worth doing on every diesel CX-5 of this generation before a test drive in traffic.

Sources: 1 2

Diesel injector leak can carbonise oil

Costly if missed

2012–2017 · SH-VPTS · diesel · Engine

What to look for: Look for black soot around the injector bodies, and check the oil is not black, gritty or sludgy.

Why it matters: If the oil strainer clogs and oil pressure drops, driving on can seize the engine, so checking for the early warning signs (sooty injectors, dirty oil, a knock at idle) is far cheaper than finding out after a seizure.

Sources: 1 2

LED daytime running light can fail

Costly if missed

2012–2017 · Electrical

What to look for: With the engine on, check both daytime running lights and side markers are steady, even and not flickering.

Why it matters: Because the DRL is sealed into the headlamp, the usual fix is a whole headlamp assembly rather than a bulb, which is an expensive repair for what starts as a small flicker, so it is worth checking both sides carefully before buying.

Sources: 1

Got a question about a Mazda CX-5 KE? Ask Credov: a noise, a warning light, a part or how to fix it.

Also check on every car

On top of the faults above, every Credov inspection covers the basics: fuel smell, leaks or filler rust, engine oil leaks, power steering fluid leak, drive belt cracks or squeal, rust underneath: chassis and mounts, engine mounts, engine oil level and colour, coolant level, colour and leaks, head gasket failure signs, cold start: rattle, knock or smoke, rough or hunting idle, engine running hot on gauge, gearbox or diff oil leak, swapped gearbox without lvv and more.

Other Mazda models

Researched by Credov from manufacturer recalls and service bulletins, owner reports and workshop sources. Repair prices are typical ranges, not quotes. See also fault codes and repair costs.