Car Model Guide/ Mazda/ 6/ GH/ 2.5

2.5 MZR25

The larger petrol and the engine that suits the chassis. It's the quickest sensible Mazda 6 of this generation and shares the smaller unit's simplicity, so the only real cost is fuel.

Overview

The 2.5 is the MZR25 petrol version of the Mazda 6 hatchback (GH), sold 2007–2012 with 170 PS and manual or automatic. Manageable at level 2. The same simple chain-driven architecture as the 2.0, so corrosion rather than mechanical failure is the limiting factor. 1 failure modes are recorded against its engine, gearbox, chassis and shared components, one of which is a walk-away item without documented proof. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

Mazda 6 hatchback (GH) · photo Mazda 6 GH Sport Dynamic Front by Thomas doerfer · CC BY-SA 3.0 · Wikimedia Commons

Power170 PS

Torque226 Nm

Years2007–2012

Fuelpetrol

DriveFWD

EnginesMZR25

Biggest risks

Ranked by probability × repair cost. 1 recorded in total.

51Demands diligence

Corrosion at the arches, sills and boot floor€300–€2,000checkablewalk away

Risk level −11 · Walk-away failures −12 · Likely spend vs price −26 · all issues →

System by system9 systems reviewed · 8 with no recurring fault reported

Engine✓ clearNo recurring fault reported for this system on this engine.

Fuel system✓ clearNo recurring fault reported for this system on this engine.

Intake & air✓ clearNo recurring fault reported for this system on this engine.

Cooling✓ clearNo recurring fault reported for this system on this engine.

Emissions✓ clearNo recurring fault reported for this system on this engine.

Transmission✓ clearNo recurring fault reported for this system on this engine.

Electrics✓ clearNo recurring fault reported for this system on this engine.

Suspension & brakes✓ clearNo recurring fault reported for this system on this engine.

Body & interior⚠ attentionCorrosion at the arches, sills and boot floor, €300–€2,000. Walk away without proof.

Pre-facelift or facelift, this engine spans both

The same badge either side of the changeover. Bands are split at the facelift year from the generation record.

Phase	Years	Low	Average	High	Good buy	What differs
pre Pre-facelift	2007–2009	€1,200	€2,200	€3,650	€1,700	The specification the car launched with.
LCI Facelift (LCI)	2010–2012	€1,350	€2,350	€4,000	€1,850	Revised nose and trim; 2.2 MZR-CD replaced the 2.0 MZR-CD diesel

Known issues, ranked by expected cost

Faults recorded against this engine, its components and its chassis, ranked by likelihood × repair cost. Costs are indicative ranges with a stated labour basis.

Corrosion at the arches, sills and boot floor6 platform€300–€2,000

Bubbling paint along the rear arches and sills, and scaling or perforation in the boot floor and around the rear suspension mounts. This generation's corrosion protection doesn't match the reputation the make carries, and cars in salted climates suffer early. It's the fault that ends these cars, because the mechanicals usually outlast the body.

Check: Put it on a ramp and look at the arches, the sills and the boot floor in good light before you look at anything else. Walk away from perforation rather than negotiating on it.

Body & corrosioncommonDetectable at viewingwalk away without proofevidence: documented

Ranked by probability × repair cost, not by how loudly a failure is discussed. Inherited from the engine, gearbox, chassis and shared components, each written once.

Pre-purchase inspection

The same issue records, reordered into the sequence you can actually check them in: cold start, static, drive, paperwork.

1 checks · saved in this browser ·

1Static checksEngine off, ideally on a lift.

Corrosion at the arches, sills and boot floorwalk away without proofPut it on a ramp and look at the arches, the sills and the boot floor in good light before you look at anything else. Walk away from perforation rather than negotiating on it.

Mileage and servicing

What the odometer does and doesn't tell you here, plus the service items whose neglect causes the expensive failures above.

Rust is the deciding factor, so inspect underneath first. Mechanical history matters less on these than on almost anything else here.

Service item	Interval	Cost
Arches, sills and boot floor Corrosion is what finishes these cars	on a ramp, before anything else	€300–2,000
Engine oil Basic maintenance on a durable engine	on time	€70–110
Front suspension A wear item on a keenly driven car	on a test drive	€250–600

What to pay

What this engine sells for, against the median of every engine in the chassis. All figures are illustrative placeholders. See the basis chips.

median €2.3k

€1.2k€1.7k€4k

Cheapfind the reasonGood buyif it checks outFairnormal moneyOverpricedneeds justifying

Asking price (€)Mileage (km)

Enter an asking price to get a verdict against this variant's band: cheap, fair, good buy or overpriced.

United States vs Europe

1 EUR = 1.08 USD · 2026-07

🇪🇺 Europe · EUR€1,700band €1,200–€4,000

🇺🇸 United StatesNot sold2.5 MZR25 was never a US-market car

What that meansNo US band exists to compare. Any car you find there's a private import, parts and specialist knowledge are thinner, and the price says more about import cost than about the market.

US figures are the EU band converted at a stated rate. No US market differential is modelled: we hold no sourced US asking prices, and inventing one would be worse than saying so. What the comparison does show for real is availability. Most of this range was never sold in the US.

ModelMazda 6 2.5
ChassisGH
EngineMZR25
Years2007–2012
MarketCentral EU
Windowrolling 12 months to 2026-07

Good buy at or under the marker · Median asking price · bar spans the 10th to 90th percentile · dashed line is the gh median, all 4 engines

Good buy isn't the same as cheapest. Any car without documentation for corrosion at the arches, sills and boot floor should be priced as if the repair is still owed. Full breakdown by facelift phase →

Buyer notes

Our judgement, kept separate from the records it's built on.

Our read, not a record

The 2.5 MZR is the engine this car should always have had. It's smooth, has real mid-range and turns a good-handling saloon into a genuinely quick one, and it shares the smaller engine's mechanical simplicity. There is no turbo, no direct injection and no particulate filter, so the running costs are fuel and tyres. As with every Mazda 6 of this era, the body is what you're really buying, so spend the inspection underneath the car.

Everything above this line comes from the issue and specification records. This paragraph is our judgement on top of them. See how we reach it.

Full specification

Manufacturer figures for this engine and body, as recorded in the variant and engine data.

Engine code	MZR 2.5
Configuration	I4, naturally aspirated · 2488 cc
Fuel / injection	petrol · port
Model years	2007–2012
Facelift phase	Sold either side of the 2010 facelift, 2007–2009 pre, 2010–2012 LCI
Power / torque	170 PS · 226 Nm
Transmissions	6-speed manual · 5-speed automatic
Gearbox families
Drivetrain	FWD
Economy (real-world)	7.5–9.5 l/100 km mixed
Markets	EU