Parts for your 2020 Suzuki Splash-Ignition coils

2020 Suzuki Splash ignition coils — what they do and when to replace them

Based on Suzuki’s factory literature for the Splash/Maruti Ritz (K10B 1.0L and K12B 1.2L) and well-known data sources like Autodata and NGK/Denso application catalogues, the petrol Splash uses coil-on-plug ignition coils (one coil per cylinder). The 1.3 DDiS diesel variant (Fiat Multijet) doesn’t use ignition coils because it’s compression-ignition and relies on glow plugs instead. So if the 2020 Suzuki Splash in question is a petrol model, ignition coils are definitely relevant.

On petrol Splashes, the ignition coils sit directly on the spark plugs, stepping 12 volts up to the tens of thousands needed to jump the plug gap and light the air–fuel mix. That direct “coil-on-plug” setup keeps spark strong and timing tidy, which helps the little Suzuki start easily, idle smoothly, and sip fuel rather than guzzle it.

There isn’t a fixed service interval for coils, but they live in a hot, cramped space under the bonnet and can tire with age, heat, or oil intrusion from a leaky rocker cover. A good rule of thumb is to inspect coils whenever spark plugs are due, follow the correct plug spec and gap, and keep the plug tubes clean and dry. If one coil fails on a high‑kilometre car, many techs will replace the set to keep things even, especially on the K10B three‑cylinder where a single miss is more noticeable.

Drivers usually notice a crook coil as a stumble or rough idle, sluggish take-off, higher fuel use, or a flashing check-engine light. Scan tools often log P0300–P0304 misfire codes or specific coil circuit faults (P0351–P0354). A quick workshop trick is a swap test: move the suspect coil to another cylinder and see if the misfire follows. Resistance checks aren’t very telling on modern coils, live data and proper load testing are better.

When replacing, use quality parts (genuine, Denso, NGK), avoid levering on the plastic body, and seat the rubber boot squarely on the plug. A tiny smear of dielectric grease can help prevent moisture tracking. Don’t keep driving with a misfiring coil — unburnt fuel can overheat the catalytic converter and cost a lot more than a coil.

• Common symptoms: rough idle, hard starts, hesitation, poor economy, sulphur smell from the exhaust, check-engine light.
• Good habits: keep water away from the plug wells, fix oil leaks promptly, replace plugs on schedule, and check coil connectors for corrosion.

FAQs

Does a 2020 Suzuki Splash have ignition coils?
Yes if it’s a petrol K10B or K12B — it uses coil-on-plug units (three on the 1.0L, four on the 1.2L). The 1.3 DDiS diesel doesn’t use ignition coils, it uses glow plugs.

How often should ignition coils be replaced on a Splash?
There’s no set interval. Replace when faulty or if misfires appear. Many owners see coils last well past 100,000 kilometres, but heat, oil leaks, and moisture can shorten life. It’s smart to assess coils when changing spark plugs.

Is it safe to drive with a failing ignition coil?
Best not. A misfire can damage the catalytic converter and strain the engine. If the check-engine light is flashing or the car’s running rough, get it checked and sorted promptly.