Suzuki Swift 6
Weaknesses, engine ratings and buying advice
The sixth generation (AZ/RZ, 2017–2020) ushered in the Boosterjet turbo era for the Swift. A lightweight platform, much fresher tech and, for the first time, turbo petrols at the core of the range — the Swift got perkier and more modern while keeping a pleasingly down-to-earth servicing approach.
The engines: For maximum simplicity, take the K12C (1.2 DualJet, 66 kW): port dual-injection instead of direct injection, no turbo, low-maintenance timing chain — easily past 200,000 km on regular oil. Just don't expect torque until higher up. The K10C (1.0 Boosterjet, 82 kW) is the lively three-cylinder turbo with direct injection — strong from low down, chain designed for life. The main theme is the typical DI carbon build-up on the intake valves with short-trip use. The highlight is the Swift Sport with the K14C (1.4 Boosterjet, 103 kW): muscular, refined, a robust Boosterjet well past 240,000 km when cared for. The chain can stretch between 100,000 and 150,000 km on neglected oil (cold-start rattle), plus intake-valve coking.
Model years: Important: from 2019 the factory underbody corrosion protection is missing — on these years inspect the underbody for rust and consider after-market treatment (€150–350). Several recalls ran: the brake-booster check valve and the rear-axle retaining bolts (HUT3).
Whole car: Front-axle creaking (€80–300), early-corroding brake lines from ~90,000 km (€150–500), the occasional A/C compressor (€300–900) and sporadic wiper/central-locking faults.
Test drive: On the DI engines (K10C/K14C) watch for hesitant pickup and rough running from carbon build-up. Judge the K14C's cold-start rattle (chain). Get under the car: check brake lines and, from 2019, underbody rust. Confirm recall status (brake booster, rear-axle bolts).
Market 2026: €9000–14,000 for the base, Swift Sport €14,000–18,000. Insider pick: the K12C DualJet for the fuss-averse — or the K14C Sport as the best fun package in the lineage.
140 PS
Swift Sport · Benzin
Best driving fun under €25,000 — no debate
Legendary!83–94 PS
1.2L DualJet Benzin
4 weaknesses
Good ChoiceGenerations
Engine Overview
The Suzuki Swift 6 is available with 3 engine variants — from 83 to 140 hp.
Three-cylinder turbo with direct injection, compact and torquey from low revs. The timing chain is designed to last and rarely causes trouble. Typical direct-injection carbon buildup on the intake valves is mitigated by clever valve overlap (internal exhaust gas recirculation) plus charge pressure in the intake, but remains a concern under short-trip use beyond roughly 120,000 km. Weak points are mainly in boost control: wastegate actuator, solenoid and a moisture-sensitive boost pressure sensor can cause power loss without a clear fault code. High-quality oil, short change intervals and occasional load runs keep the engine clean.
- !! Carbon Deposits on Intake Valves from 120,000 km
Direct injection deposits carbon on the intake valves since no fuel washes them clean. Suzuki mitigates this with valve overlap and charge pressure, but short-trip use still produces deposits that can cost power and smoothness from around 120,000 km onward.
Symptoms: Power loss, rough idle and slight hesitation on pull-away. Increased fuel consumption. Uneven running at low revs. - !! Intermittent Boost Pressure Loss — Vacuum System/ECU from 90,000 km
Boost loss without a clear fault code occurs, often from a sticking wastegate solenoid, a faulty wastegate actuator or a moisture-sensitive boost pressure sensor (O-ring). Noticeable as lack of power under full load.
Symptoms: Sudden massive power loss on acceleration. Boost pressure gauge stays in the lower range. Sporadic self-recovery without fault code. - !! High-Pressure Pump Failure — Power Loss from 140,000 km
The high-pressure pump of the direct injection can weaken at high mileage and fail to build the required system pressure. The result is starting problems, hesitation and sudden power loss, typically between 140,000 and 180,000 km.
Symptoms: Loud engine rattling and power loss. Poor starting behaviour. Rough running.
+ 1 more engine weaknesses + vehicle weaknesses
Robust 1.2-litre four-cylinder with dual port injection (two injectors per cylinder) and dual variable valve timing. No turbo, a low-maintenance timing chain and port injection instead of direct injection make it one of the most trouble-free petrol engines in its class, easily clearing 200,000 km on regular oil changes. Torque arrives high in the rev range, so it likes to be worked through the gears. The main real-world topic is the water-cooled EGR valve, which cokes up under stop-start short-trip use and causes low-rpm hesitation. Stick to the specified 0W-20 and run the occasional longer journey and the engine runs without complaint.
- ! Valve Cover Oil Seepage from 90,000 km
Slight oil seepage at the valve cover gasket at higher mileage. Not a safety-critical issue, but oil level must be checked regularly to prevent engine damage.
Symptoms: Oil smell in engine bay, visible discolouration at the valve cover, slight oil traces on the engine block - ! Start-Stop System Failure from 80,000 km
The start-stop system can remain permanently disabled with a weak starter battery or after frequent short trips. A battery replacement usually suffices; occasionally a control unit adaptation is needed.
Symptoms: 'Eng-A-Stop OFF' warning light on permanently, automatic engine stop no longer functioning - ! EGR valve carbon fouling from 90,000 km
The water-cooled EGR valve clogs with soot and oil mist under predominantly short-trip use. The result is noticeable hesitation at low rpm, especially in 2nd and 3rd gear around 2800 rpm. Cleaning or replacement fixes it.
Symptoms: Jerking and head-nodding on acceleration at low rpm, rough idle, sluggish throttle response, possible fault code P0403
+ 1 more engine weaknesses + vehicle weaknesses
Turbocharged four-cylinder with direct injection, strong and refined, regarded as a robust Boosterjet with a long life expectancy beyond 240,000 km when well maintained. The timing chain is durable but can stretch between 100,000 and 150,000 km with neglected oil changes, announced by cold-start rattle and rough running. Direct injection causes carbon buildup on the intake valves, more pronounced under short-trip use. The high-pressure pump and injection system can cause power loss, starting problems and hesitation at high mileage. Aluminium engine — avoid overheating at all costs and keep an eye on the cooling system. High-quality oil and regular changes are essential.
- !! Intake Valve Carbon Deposits from 120,000 km
The direct injection contributes to carbon buildup on the intake valves, as no fuel washes them clean. Under short-trip use deposits accumulate that can impair power and smoothness from around 120,000 km onward.
Symptoms: Hesitant pull-away, rough idle, noticeable power loss, increased fuel consumption - !! Timing Chain Stretch from 100,000 km from 125,000 km
The timing chain can stretch with neglected oil changes between 100,000 and 150,000 km. This is announced by cold-start rattle and rough running. With good oil and short intervals the chain lasts considerably longer.
Symptoms: Rattling on cold start that subsides after warm-up; engine warning light for camshaft timing fault - !! High-pressure pump / injection from 150,000 km
The high-pressure pump and injection system of the direct injection can fail to reliably build the required system pressure of around 200 bar at high mileage. Typically between 140,000 and 180,000 km, often accompanied by clogged fine nozzles.
Symptoms: Rough running, starting problems, hesitation and sudden power loss.
+ 1 more engine weaknesses + vehicle weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| Recall: brake servo check valve The vacuum pump check valve can swell due to fuel and oil additives, temporarily disabling the brake servo. Drivers need to apply significantly more pedal effort. Symptoms: Significantly increased pedal effort required; brakes remain functional but noticeably harder | Low | |
| Recall: rear axle retaining bolts (HUT3) On vehicles produced between October and December 2015, the locking coating on the rear axle bolts may be missing. The bolts can gradually work loose, negatively affecting handling. Symptoms: Vague handling, changed steering feel; develops gradually | Low |
Test Reports
AUTO BILD TÜV Report 2025
The sixth-generation Swift shows unremarkable chassis components at the MOT. Hybrid variants are affected by a recall for unintended emergency braking activation. Further recalls concern faulty airbags and seatbelt pre-tensioners.
2024-11Alternatives
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Known Problems and Issues +
A total of 19 weaknesses have been documented for the Suzuki Swift 6 (2017–2020) — 12 engine-related and 7 vehicle-related. Typical issues affect Other, Rust, Suspension, Electronics. Considered reliable: K12C (1.2L DualJet), K10C (1.0L Boosterjet), K14C (1.4L Boosterjet).
What to watch out for with the Suzuki Swift? See the detailed listing of all engine and vehicle weaknesses in the sections above.
Frequently Asked Questions
What problems and weaknesses does the Suzuki Swift 6 have? +
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Last updated: February 2026 · All information without guarantee