Parts for your 2014 Nissan Pulsar-Ignition coils

2014 Nissan Pulsar ignition-coils: what they do and when to replace them

Technical sources including Nissan’s Electronic Service Manual (ESM) for the B17 sedan and C12 hatch, plus industry catalogues from NGK/NTK and Bosch, confirm the 2014 Nissan Pulsar runs coil-on-plug ignition coils. Whether it’s the 1.8-litre MR18DE petrol or the 1.6-litre MR16DDT turbo SSS, there’s one ignition coil per cylinder (four in total). So yes—ignition-coils are fitted and absolutely relevant for servicing this model.

On this Pulsar, each ignition coil sits directly on top of a spark plug and converts the car’s 12 volts into the high voltage needed to jump the plug gap. The ECU fires each coil precisely, which keeps the engine smooth, efficient and clean on emissions. Coil-on-plug design also cuts down on leads and electrical losses, improving reliability when everything’s in good nick.

Ignition coils aren’t a scheduled service item on the 2014 Pulsar, they’re typically replaced only when faulty. That said, good maintenance helps them last. Sticking to the correct spark plugs and change interval (often around 100,000 km for iridium plugs, per service schedules) reduces coil stress. Keep water and degreaser away from the coil wells when cleaning the engine bay, and fix any rocker cover gasket leaks that could let oil pool around the plugs.

• Common symptoms of a failing coil: rough idle, hard starts, sluggish performance, higher fuel use, and a check-engine light with misfire codes (P0300–P0304) or an ignition circuit fault.
• Basic diagnosis: scan for codes, inspect coil boots for cracks or carbon tracking, check for oil or moisture in the plug wells, and use a swap test (move a suspect coil to another cylinder to see if the misfire follows).
• Replacement tips: use quality coils matched to the exact engine (MR18DE vs MR16DDT can differ), seat the rubber boot cleanly on the plug, apply a small amount of dielectric grease, and tighten the coil hold-down to the factory spec (around 6–8 N·m—confirm in the ESM). Clear codes and road-test.

Owners who’ve clocked up big kilometres or who have a turbo SSS that lives on boost might choose to replace coils as a set when multiple misfires appear, but it’s fine to replace one at a time if diagnostics point to a single culprit. Getting onto a dodgy coil sooner rather than later helps protect the catalytic converter from unburnt fuel and keeps the Pulsar feeling crisp.

How many ignition coils are in a 2014 Nissan Pulsar?
There are four coils—one per cylinder. Note that the MR18DE and MR16DDT may use different part numbers and specs, so matching by engine code and VIN is the safe bet.

When should the coils be replaced?
There’s no fixed interval. Many last well beyond 100,000 km. Replace a coil when it shows misfire or circuit fault symptoms. Changing plugs on time and keeping moisture out of the plug wells helps coils live longer.

Can driving with a bad coil cause damage?
Yes. A persistent misfire can send unburnt fuel into the exhaust, which can overheat and damage the catalytic converter. If there’s a misfire, it’s best to keep driving to a minimum and sort it promptly.