Credov's researched list of the 2 faults the Mazda Mazda6 GY is known for (2005–2008), 2 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.
What to look for: Feel for a thump or flare shifting 1st-2nd and 2nd-3rd, worse when cold, and slipping on hills.
Why it matters: Owner reports and complaint data describe the same pattern on this automatic: shifts getting rougher with age, old unchanged fluid making it worse, and a used gearbox often being the only fix once it slips. Checking the fluid-change history and feeling the shifts avoids buying a car close to a gearbox replacement.
What to look for: From a stone-cold start, listen at the engine's timing end for a rattle that lasts a few seconds.
Why it matters: Left alone, a stretched chain or worn VVT gear can jump timing; on these engines that lets the valves hit the pistons and destroys the engine. Owners have reported engines failing at 145,000-250,000 km after exactly this rattle was ignored, so an early chain-and-tensioner job is far cheaper than the alternative.
Got a question about a Mazda Mazda6 GY? Ask Credov: a noise, a warning light, a part or how to fix it.
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.
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.