What are the signs of timing chain failure in a Suzuki Swift 1.2 Dualjet Mild Hybrid-

The most common early warning is a rattling noise from the engine on cold start-up, which may persist as the engine warms up.

SUZUKI SWIFT 1.2 DUALJET HYBRID SPECIALISTS

Suzuki Swift 1.2 Dualjet Mild Hybrid Engine Replacement Compare Prices & Get Quotes

Q: How much does a Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement cost-

A replacement Suzuki Swift 1.2 Dualjet Mild Hybrid engine typically costs between £2,000 and £3,500 for a rebuilt unit fitted by a specialist. Used engines start from around £450 supply-only.

Q: How long does a Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement take-

A full engine replacement typically takes 2-5 days depending on the workshop's schedule and parts availability.

Get free quotes today from trusted UK Suzuki Swift 1.2 Dualjet Mild Hybrid engine specialists. Compare prices on reconditioned, rebuilt and used engines for your K12C Dualjet - supply & fit available nationwide.

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Suzuki Swift 1.2 Dualjet Mild Hybrid Engine

from£1,500 to £2,800

Usedfrom £450
Reconditionedfrom £1,500
Common codesK12C

Suzuki swift 1.2 Dualjet Mild Hybrid Used Engine — K12C

Suzuki swiftUsed Engine — K12C

Suzuki swift 1.2 Dualjet Mild Hybrid Reconditioned Engine — K12C

Suzuki swiftReconditioned Engine — K12C

Suzuki swift 1.2 Dualjet Mild Hybrid Rebuilt Engine — K12C

Suzuki swiftRebuilt Engine — K12C

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Suzuki Swift 1.2 Dualjet Mild Hybrid Engine History & Specs at a Glance

The Suzuki Swift 1.2 Dualjet Mild Hybrid arrived in 2017 as part of the third-generation Swift range, introducing Suzuki's K12C Dualjet engine with a 12-volt mild-hybrid system to improve fuel efficiency and reduce emissions without compromising the Swift's reputation for reliability and driving enjoyment.

2017
K12C 1.2-litre four-cylinder Dualjet naturally aspirated petrol engine launched with 90hp, paired with a 12V mild-hybrid system (SHVS) in UK and European markets
2018
Production continues with minor specification updates; SZ-T and SZ5 trim levels available
2019
Euro 6d-TEMP emissions compliance introduced
2020
Facelift introduces K12D Dualjet Hybrid engine replacing K12C, with 83hp and revised mild-hybrid system
2021
2023 - K12D continues as the sole 1.2 Dualjet Hybrid option in the UK market

Every engine fitted to the Suzuki Swift 1.2 Dualjet Mild Hybrid is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Suzuki Swift 1.2 Dualjet Mild Hybrid Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

K12C — 1.2L Dualjet Petrol Mild Hybrid (2017-2020)

Power Output: 90hp (66kW)
Years Fitted: 2017-2020

Can’t find your exact engine code?-> Get quotes for K12C Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement

-> Get quotes for K12C Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement

Common Problems

Suzuki Swift 1.2 Dualjet Mild Hybrid Engine Problems Repair Cost vs Replacement

The Suzuki Swift 1.2 Dualjet Mild Hybrid's K12C and K12D engines are generally regarded as reliable units, but a few issues have been reported by owners. The most common concerns are timing chain tensioner wear on earlier K12C engines and injector sealing problems across the Dualjet family. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Timing Chain Tensioner Wear

Affected: Suzuki Swift 1.2 Dualjet Mild Hybrid (K12C, 2017-2020)
Typical failure mileage: 60,000-100,000 miles

Root cause

The K12C engine uses a timing chain with a hydraulic tensioner. Some owners have reported a rattling noise on cold start-up or at operating temperature, which may indicate tensioner wear or chain stretch.

Repair options

Repair tier	Dealer price	Specialist price
Timing chain tensioner replacement	£800-£1,200	£500-£800
Full Replacement - rebuilt/reconditioned engine	£2,800-£4,500	£2,000-£3,500

Our recommendation

If you hear a rattling noise from your Suzuki Swift 1.2 Dualjet Mild Hybrid on start-up, have the timing chain inspected immediately - catching it early could save you thousands. The K12C engine is generally reliable, and a timing chain tensioner replacement is a manageable repair. If the engine has already failed or is showing multiple issues, a rebuilt unit with upgraded components offers the best long-term reliability.

-> Compare rebuilt K12C Suzuki Swift 1.2 Dualjet Mild Hybrid engine prices

Injector Sealing Issues

Affected: Suzuki Swift 1.2 Dualjet Mild Hybrid (K12C/K12D, 2017-present)
Typical failure mileage: 50,000-80,000 miles

Root cause

The Dualjet engine features two injectors per cylinder. Some owners have reported injectors failing to seal properly, leading to fuel entering the cylinders after the engine is switched off.

Repair options

Repair tier	Dealer price	Specialist price
Injector replacement	£600-£1,000	£400-£700
Full Replacement - rebuilt/reconditioned engine	£2,800-£4,500	£2,000-£3,500

Our recommendation

If you notice a strong smell of fuel, rough running, or a check engine light on your Suzuki Swift 1.2 Dualjet Mild Hybrid, have the injectors checked immediately. The Dualjet system is sophisticated, and injector issues can lead to more serious problems if ignored. A specialist with experience on the K12C/K12D platform is recommended.

-> Compare rebuilt K12C Suzuki Swift 1.2 Dualjet Mild Hybrid engine prices

Don't Let Engine Failure Write Off Your Suzuki Swift 1.2 Dualjet Mild Hybrid

The Suzuki Swift 1.2 Dualjet Mild Hybrid is a reliable and efficient daily driver, but when the engine does fail, a proper rebuilt unit with upgraded components and a 12-month warranty is the most reliable path forward. Compare quotes from our network of specialists today - supply and fit available nationwide, with prices that beat main dealer every time.

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FAQ

Suzuki Swift 1.2 Dualjet Mild Hybrid Engine ReplacementFrequently Asked Questions

Everything Suzuki Swift 1.2 Dualjet Mild Hybrid owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

A typical 2017-2020 Suzuki Swift 1.2 Dualjet Mild Hybrid retains significant value (£5,000-£12,000 depending on condition and mileage), so a rebuilt engine at £2,000-£3,500 fitted is usually a sound investment.

Vehicle value typically justifies replacement cost
Rebuilt units include upgraded components preventing recurrence
12-month unlimited-mileage warranty provides peace of mind
Compare replacement options against vehicle value and condition

-> Get a Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement quote

The K12C engine in the Suzuki Swift 1.2 Dualjet Mild Hybrid is prone to two primary issues: timing chain tensioner wear and injector sealing problems.

Timing chain tensioner wear can cause rattle and potential timing issues
Dualjet injectors can fail to seal, leading to fuel in cylinders after shutdown
The 12V mild-hybrid system components (battery, ISG) can also fail independently
Regular servicing and early attention to warning signs are critical

-> Compare Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement prices

The K12C was the original 1.2 Dualjet engine used from 2017 to 2020, producing 90hp. The K12D replaced it from 2020 onwards with 83hp and a revised 12V mild-hybrid system.

K12C: 90hp, used 2017-2020
K12D: 83hp, used 2020-present
Both are 1.2-litre four-cylinder Dualjet petrol engines with mild-hybrid assistance
The K12D features a more efficient 12V hybrid system with a larger lithium-ion battery

-> Get a Suzuki Swift 1.2 Dualjet Mild Hybrid engine quote today

Why Choose Us

Compare Suzuki Swift 1.2 Dualjet Mild Hybrid Engine Prices Today

Comparing quotes for your Suzuki Swift 1.2 Dualjet Mild Hybrid engine replacement is completely free and carries no obligation. Enter your registration above to get matched with vetted UK specialists who stock the correct K12C or K12D engine for your hybrid - whether you need a used unit, a reconditioned engine, or a fully rebuilt motor with upgraded components and a 12-month warranty.

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