Why it can be a good car
The 2015 Mustang opened the S550 generation — the first with independent rear suspension — and is genuinely good to drive. Engines range from a 3.7-liter V6 (base) and a lively 2.3-liter EcoBoost turbo four to the 5.0-liter V8 GT. The 6R80 automatic is very reliable and the MT82 manual has no catastrophic failures. Reliability is about average for the year; the caveats are a first-year recall list and the fact that it's a car people drive hard.
The things to check
- Which engine and how it was driven The V6 and EcoBoost are easy to live with; the 5.0 GT is stout but often driven hard — look for signs of abuse (tires, brakes, clutch on a manual).
- GT valve/timing cover leak On 2015–2017 GT (5.0) cars, the plastic valve/timing covers can warp and leak oil; check for seepage on a V8.
- Electrical Most-reported problems are non-engine electrical items; test everything.
Open recalls — a longer list than most
The 2015 Mustang had a longer-than-average recall list — including an early-build cable-near-exhaust fire risk, a front seat-belt-anchor corrosion item on 2015–2017 cars, and a rearview-camera wiring item. Every one is VIN-specific, so check the exact car's open recalls free by VIN at NHTSA; a Ford dealer completes any open recall at no charge.
What a history report tells you — and what it doesn't
On a car like this, the individual car's history is most of the decision. A history report is a record of what got reported — title brands, reported accidents and damage, odometer readings over time, and service records where they exist. That is what separates a clean, maintained example from a salvage-title or flood car wearing the same badge.
What a history report is not is a forecast, and an absence of records is not proof of a clean past — plenty happens to a car that never gets reported. That is why the honest answer is always the pair: the documented history and an in-person inspection by a mechanic you trust, on the specific car.
On a performance car especially, a clean accident history and signs of gentle use matter — a hard-launched, modified, or crash-repaired Mustang is a different buy from a stock, well-kept one.
The things to check before you buy
- Signs of hard use Tires, brakes, clutch (on a manual), and any modifications or track use.
- GT valve-cover leak On a 5.0 V8, check for oil seepage from the plastic covers.
- Electrical Test all the electronics, camera, and infotainment.
- Recall status Confirm the several possible recalls are completed on this VIN.
- Accident and rust Sight down panels; on salt-belt cars, look underneath.
What would make you walk
- A hard-used or modified car with no records Track use, launches, or modifications with no maintenance history.
- A GT with a heavy valve-cover leak and no plan Significant oil seepage the seller won't address.
- Poorly repaired structural damage Mismatched panels or signs of a serious hit — common on sports cars.
- Uncompleted safety recalls the seller won't resolve Especially the early-build fire-risk or seat-belt items.