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Ford Mustang V6 common problems: what to check before you buy

Credov's researched list of the 3 faults the Ford Mustang V6 is known for (2005–2010), 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 Ford Mustang V6

Timing chain guides break

Costly if missed

2005–2010 · 4.0 SOHC V6 (Cologne), 4.0 V6, Cologne V6, 4.0 · petrol · Engine

What to look for: Listen at a cold start, bonnet open, for a metallic rattle or slap that fades as oil pressure builds.

Why it matters: Because the rear chain sits at the back of the engine, a proper repair usually means taking the engine out, and left too long the chain can jump timing and damage the heads and valves.

Sources: 1 2

5R55S auto slips, loses reverse

Costly if missed

2005–2010 · petrol · Gearbox

What to look for: Select reverse from cold and warm, checking for a delay, clunk or no drive, and feel for slip on an overtake.

Why it matters: This gearbox has no dipstick, so the fluid is rarely checked or changed, and once the servo bore wears, the usual fix is a rebuild with the bore sleeved or a replacement gearbox.

Sources: 1 2

MT82 notchy, locks out

Costly if missed

2011–2014 · petrol · Gearbox

What to look for: From cold, try every gear including reverse and feel for notchiness, a crunch, or a gear that refuses.

Why it matters: Owners traced this to a mix of clutch drag, a weak factory shifter mounting and tired fluid, and grinding on every shift can also mean worn synchros needing a gearbox rebuild.

Sources: 1 2

Got a question about a Ford Mustang V6? 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 Ford 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.