Parts for your 2017 Suzuki Splash-Ignition coils

2017 Suzuki Splash ignition coils — what they do and when to replace them

Technical sources including Suzuki’s K10B/K12B engine workshop manuals and parts catalogues, the Maruti Suzuki Ritz (Splash) service manual, and aftermarket catalogues from NGK/Bosch note the petrol Splash engines use a coil-on-plug ignition system (one ignition coil per cylinder). By contrast, the 1.3 DDiS Multijet diesel (as documented in Fiat/Suzuki service literature) is compression-ignition and has no spark plugs or ignition coils. So, ignition coils are relevant and fitted to 2017 Splash vehicles with the 1.0 or 1.2 petrol engines, they’re not used on the DDiS diesel.

On petrol models, the ignition coils sit under the bonnet directly atop each spark plug. Their job is to step up battery voltage and deliver a crisp spark at the right moment for clean combustion. Healthy coils mean smooth idle, good fuel economy, easy cold starts, and lower emissions—handy for keeping rego inspections and WOF checks hassle-free across Australia and New Zealand.

As part of servicing, it pays to give the coils and plugs some attention. While coils aren’t a fixed-interval replacement item, they live in heat, vibration, and moisture. When they weaken, the Splash can misfire under load, throw fault codes (often P0300–P0304), feel flat, and chew through fuel. A quick visual once-over at each service is smart: look for cracked housings, swollen boots, oil in the plug wells, or green/white corrosion on connectors. If a misfire is present, swap the suspect coil to another cylinder to see if the fault follows—simple and effective.

• Replace coils in pairs or as a full set if multiple units test weak, and always fit fresh plugs at the same time.
• Use quality OEM-equivalent coils, cheapies can cause repeat misfires and cat damage.
• Keep plug wells clean and dry, address any rocker cover oil leaks promptly.
• Seat connectors fully until they click, never tug coils out by the wiring.
• If touring big kilometres, carrying a spare coil isn’t a bad shout.

Owners can expect long service life from genuine coils, especially if spark plugs are replaced on schedule and the engine is kept leak-free. A brief scan-tool check during routine servicing helps catch weak coils early, saving the catalytic converter and keeping the Splash running sweet.

Popular questions

How often should ignition coils be replaced on a 2017 Suzuki Splash?
There isn’t a fixed kilometre interval in Suzuki literature, coils are replaced on condition. If the Splash runs smoothly, passes emissions, and shows no misfire codes, the coils can stay in. Replace any coil that causes a cylinder-specific misfire or fails a swap test, and consider doing a set if more than one is weak.

Are coils the same between the 1.0 and 1.2 petrol Splash engines?
Both use coil-on-plug, but part numbers can differ by engine code, market, and build date. Check the VIN against a Suzuki parts catalogue or trusted aftermarket reference to ensure the correct coil for K10B vs K12B.

Can driving with a failing coil damage anything?
Yes. Persistent misfires can overheat and poison the catalytic converter and may stress the ignition driver circuitry. If the Splash starts to miss under load or flashes the MIL, it’s best to diagnose and sort the coil and spark plug promptly.