What is the socket size of the spark plug?

You will use either a 16mm deep socket or 5/16" spark plug socket for installation. Be certain to verify each spark plug gap at .044" before you install.

2012 Hyundai Elantra—Amazon says it fits this car but has anyone tried it?

According to the NGK Part Finder, it only works for the L4 1.8L Engine. You need the ZFR5FIX-11 for the 2.0 Engine. The OE Part for the 2.0 is IZFR5L11

Are these better than the original honda crv (2011) spark plugs (denso sxu22hcr11s)?

I think so. I have iridium plugs in all my cars.

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⚡ Ignite your drive with NGK Iridium IX – where precision meets power!

LEAK PROOF DESIGN - Triple gasket seal and longer insulated nose eliminate combustion gas leakage and contamination.
HEAT WEAR RESISTANCE - Iridium alloy withstands extreme temperatures and electrical wear, perfect for high-performance engines.
PRECISION IGNITION POWER - Laser-welded fine iridium tip ensures ultra-stable sparks for peak engine performance.
OPTIMIZED THROTTLE RESPONSE - Tapered ground electrode minimizes electrical burning, delivering sharper throttle control.
CORROSION SEIZE PROTECTION - Trivalent metal plating offers superior corrosion resistance and anti-seizing properties for longevity.

The NGK LKR7DIX-11S Iridium IX Spark Plug pack of 4 features a 0.6mm laser-welded iridium tip for consistent ignition, a high melting point iridium alloy for durability, and a triple gasket seal to prevent combustion gas leaks. Designed for performance enthusiasts, it enhances throttle response, resists corrosion with trivalent plating, and fits high-performance engines requiring reliable, long-lasting spark plugs.

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Manufacturer	NGK
Brand	NGK
Model	Spark Plug
Product Dimensions	14.81 x 10.16 x 2.54 cm; 181.44 g
Item model number	LKR7DIX-11S
Position	Center
Item Dimensions L x W x H	14.8 x 10.2 x 2.5 cm
Item Weight	181 g

NGK LKR7DIX-11S Iridium IX Spark Plug (93175, Iridium Ix), Pack of 4

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