Car Model Guide/ Suzuki/ Swift/ FZ/ 1.2

1.2 K12B

A chain-driven port-injected four with variable valve timing and nothing else to go wrong. It's the reason a Swift costs so little to keep, and it will outlast the bodywork around it.

Overview

The 1.2 is the K12B petrol version of the Suzuki Swift hatchback (FZ), sold 2010–2017 with 94 PS and manual or automatic. Low risk at level 1. There's no turbocharger, no filter and no expensive failure recorded against this engine. 1 failure modes are recorded against its engine, gearbox, chassis and shared components. Prices on this page are illustrative placeholders rather than a sourced market sample. See the methodology for how the bands are derived.

Suzuki Swift hatchback (FZ) · photo 2011 Suzuki Swift (FZ) GL 5-door hatchback (2012-10-26) by OSX · Public domain · Wikimedia Commons

Power94 PS

Torque118 Nm

Years2010–2017

Fuelpetrol

DriveFWD / 4x4

EnginesK12B

Biggest risks

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

94Dependable

Underbody and rear beam corrosion€200–€900checkable

Likely spend vs price −6 · 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 & interiorwatchUnderbody and rear beam corrosion, €200–€900.

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	2010–2012	€4,200	€6,500	€9,500	€5,350	The specification the car launched with.
LCI Facelift (LCI)	2013–2017	€4,600	€7,100	€10,350	€5,850	Minor trim revisions; Added equipment on mid grades; Dual-jet 1.2 in some markets

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.

Underbody and rear beam corrosionFZ body€200–€900

Flaking rust on the rear beam, the subframe and the fuel and brake lines, sometimes with an advisory already on the record. Protection underneath was thin for cars sold into salted climates, and the beam and its mounts hold moisture. The mechanicals outlast the structure here, which inverts the usual buying advice.

Check: Get the car on a ramp or at least look underneath with a torch, paying attention to the rear beam, its mounting points and the brake lines. This matters more than anything under the bonnet on these.

Body & corrosioncommonDetectable at viewingevidence: documented120–220k km

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.

Underbody and rear beam corrosionGet the car on a ramp or at least look underneath with a torch, paying attention to the rear beam, its mounting points and the brake lines. This matters more than anything under the bonnet on these.

Mileage and servicing

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

These run to high mileage with nothing more than oil and tyres, so a 180,000 km car with a stamped book is a sound buy. The bodywork will tell you more than the odometer does.

Service item	Interval	Cost
Engine oil and filter The chain and its tensioner depend on clean oil.	15,000 km or annually	€60–100
Underbody inspection Corrosion on the rear beam and subframe is what ends these cars.	annually	€0–60

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 €6.8k

€4.2k€5.3k€10.3k

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€5,350band €4,200–€10,350

🇺🇸 United StatesNot sold1.2 K12B 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.

ModelSuzuki Swift 1.2
ChassisFZ
EngineK12B
Years2010–2017
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 fz median, all 2 engines

Good buy isn't the same as cheapest. The good-buy figure assumes the known failure items are either done with receipts or verifiably not yet due. Full breakdown by facelift phase →

Buyer notes

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

Our read, not a record

A Swift is light, keen and genuinely fun on a back road, and the 1.2 has a timing chain rather than a belt, so there's no scheduled engine job waiting for you. Spend your inspection time underneath, since corrosion on the subframe and the rear beam is what finishes these. Check the suspension for knocks over rough ground. So take the four-wheel-drive version if you find one, because it's rare and it costs almost nothing extra to run.

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	K12B 1.2 VVT
Configuration	I4, naturally aspirated · 1242 cc
Fuel / injection	petrol · port
Model years	2010–2017
Facelift phase	Sold either side of the 2013 facelift, 2010–2012 pre, 2013–2017 LCI
Power / torque	94 PS · 118 Nm
Transmissions	5-speed manual · CVT
Gearbox families	Suzuki five-speed manual
Drivetrain	FWD · 4x4
Economy (real-world)	5–6 l/100 km mixed
Markets	EU