NGK's Iridium MAX construction: a fine-wire iridium centre electrode paired with a platinum chip on the ground electrode. Built to outlast a conventional plug several times over.
The fine wire concentrates the spark into a smaller, sharper discharge. In everyday driving that shows up as easier cold starts, a steadier idle and cleaner combustion. And because iridium barely erodes, the gap stays where the factory set it instead of drifting wider over the miles.
Direct fit. No tuning changes, no adapters, nothing to set up.
Find your car
Hyundai 1.2 Kappa · Grand i10 · Xcent · i20 Sportz & Active · i20 Elite · Aura (Jan 2020 to Jan 2023) · Grand i10 Nios (Aug 2019 to Jan 2023) Takes 4
Tata 1.2 Revotron · Zest · Bolt · Tiago · Tigor · Altroz (Feb 2020 to current) · Punch Takes 3
Maruti Suzuki 1.2 K12M Takes 4
Baleno · Oct 2015 to Feb 2022
Swift · Oct 2014 to Feb 2021
Dzire · Feb 2015 to Mar 2020
Wagon R 1.2 · Jan 2019 to Feb 2022
Ciaz 1.2 · up to Jul 2018
Ignis · 2017 to current
NGK offers no iridium of its own for the K12M, so this is the upgrade owners fit. Newer Maruti 1.2s run the K12N DualJet and take the ILZKR6F11 instead, which we also stock.
Looking for the NGK IKR6G11? We no longer stock it: it is supplied only as a Maruti genuine part, so we cannot source it. If your car is a 1.2 K12M from the list above, this LKR7BIX-P is the NGK iridium for it. K12N DualJet cars take the ILZKR6F11, and the newer 1.5 K15C cars take the ILZKR6Q11. On a K15B, message us with your model and year and we will confirm the right plug.
Tata turbo petrol owners, this is not your plug. The Nexon 1.2 Revotron turbo and the Curvv take a colder plug than this one. Fitting an Iridium MAX here would put a hotter plug into a turbocharged engine, which we would not recommend. Message us with your model and we will point you to the right part.
Running CNG?
On a CNG car this is the better plug, not a compromise. Most of the cars above are common CNG conversions, and gas asks different things of a spark plug than petrol does. All four differences point the same way here.
CNG runs hotter. There is no liquid fuel evaporating to cool the intake charge, so combustion temperatures climb. This plug is heat range 7, one step colder than the standard plug, which is the direction a gas engine wants.
CNG is harder to light. It needs more ignition voltage than petrol. The fine iridium wire concentrates the spark and fires at lower voltage, so it works with the gas rather than against it.
CNG wears electrodes faster. Gas is harder on a plug than petrol is. Iridium barely erodes, which is exactly where it pays for itself. On CNG an ordinary plug is something you replace often.
CNG burns clean. Almost no carbon, so the colder heat range carries no fouling penalty on a gas car.
Fit them as supplied. It is still worth having the plugs checked slightly earlier than on a petrol-only car, simply because gas is harder on them.
Specifications
Part number · LKR7BIX-P
Type · Iridium centre, platinum ground chip
Thread · 12mm · Reach 26.5mm · Hex 16mm
Heat range · 7
Gap · 0.9mm, factory pre-set
Sold as · single plug
On the Maruti K12M this runs one step cooler than the standard plug. Cooler is the safe side: it will not harm your engine, and it suits highway running well. On a petrol car used only for very short city trips, have the plugs looked at come service time. On CNG this is an advantage rather than a caveat, see above.
Different plug: Swift and Dzire before Oct 2014, and the K15B cars (S-Cross, Ertiga, XL6, Ciaz 1.5, Jimny), use a shorter 19mm reach plug.
Fitting
Arrives pre-gapped and ready to fit. Thread in by hand first, then torque to your manual's figure. If you check the gap, move the outer electrode only.
Unsure which you need? Send us your model and year and we will confirm before you order.
Read
more
less
