Parts for your 2018 Suzuki Splash-Ignition coils

Ignition coils for the 2018 Suzuki Splash

Based on technical references, ignition coils are relevant and used on petrol-powered 2018 Suzuki Splash models. Suzuki’s K-series petrol engines (K10B 1.0L and K12B 1.2L) employ a coil-on-plug direct ignition system, detailed in Suzuki workshop/service manual sections for “Ignition System – Direct Ignition (K10B/K12B)”. Major aftermarket catalogues, including NGK/NTK Vehicle Electronics and DENSO Aftermarket e-Catalogue, list individual coil-on-plug units for the Splash/Ritz 1.0 and 1.2 engines of this generation. Note: the rare D13A diesel variant does not use ignition coils (it uses glow plugs), but the petrol Splash does.

The ignition coils on a 2018 Suzuki Splash do the heavy lifting for spark—taking the battery’s 12 volts and stepping it up to tens of thousands to jump the spark plug gap. On the K-series engines, each cylinder gets its own coil-on-plug, which keeps the spark strong and timing sharp while cutting down on high-tension leads and potential misfire points. It’s a tidy, modern setup that helps the little Suzuki stay frugal and zippy around town.

As part of routine servicing, it’s smart to give the coils and plug wells a quick once-over. Look for cracked housings, swollen or carbon-tracked boots, and any oil or moisture in the wells (rocker cover gasket weeps can cause dramas). Pair coils with the correct spec spark plugs and keep plug gaps within spec—over-gapped plugs make coils work harder and can shorten their life. There’s no fixed replacement interval for coils, they’re typically replaced on condition. If chasing a misfire, scan for codes like P0301–P0304, compare misfire counts, and swap suspected coils between cylinders to confirm a fault without guesswork. When installing, seat the boots cleanly, avoid dielectric grease on the electrical terminals (a tiny smear on the inside of the rubber boot is fine), and tighten mounting bolts to the manufacturer’s spec—no over-torquing.

Symptoms of a tired coil can include rough idle, hesitation under load, hard starts, higher fuel use, and a flashing check engine light. Don’t keep driving with a dead miss, unburnt fuel can overheat the catalyst. On higher-kilometre cars, replacing coils in pairs (or as a full set) alongside new plugs can save repeat visits. Choose reputable brands that meet OE spec, and the Splash’s ignition will be sweet for years.

• Common signs: rough idle, loss of power, poor economy, check engine light.
• Good practice: inspect each service, replace on condition, fit correct plugs.
• Note: petrol Splash uses 3 coils (K10B) or 4 coils (K12B), diesel uses none.

FAQs

How many ignition coils does a 2018 Suzuki Splash have?
The petrol Splash uses one coil per cylinder. That’s three coils on the 1.0L K10B (3-cylinder) and four coils on the 1.2L K12B (4-cylinder). If the vehicle is the diesel variant, it uses glow plugs instead of ignition coils.

Is it OK to drive with a failing ignition coil?
It’ll often run, but it’s not a good idea. A misfiring cylinder can dump raw fuel into the exhaust, risking damage to the catalytic converter and oxygen sensors. It also hurts fuel economy and performance. Get it diagnosed and sorted promptly.

What’s a typical replacement time and cost?
On a Splash, access is straightforward. Expect roughly 0.5–1.0 hour for diagnosis and replacement of a single coil. Quality coils vary by brand, as a ballpark, budget for parts in the mid-to-high double digits per coil, plus labour, in AUD/NZD. Many owners replace spark plugs at the same time.