6 Best 08 Honda Accord Spark Plugs | Sharp Starts, Smoother Idle

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The finewire iridium tip that makes a 2008 Accord V6 feel responsive again.

You get a much sharper spark with this set because the center electrode uses a 0.6mm finewire iridium tip, which concentrates the ignition energy into a tight, consistent flame kernel rather than letting it scatter. That means the 3.5L V6 fires up quicker on cold mornings and the engine idles with less vibration after the swap. The set carries the OE cross-reference 93175 / LKR7DIX-11S, so it directly replaces the factory plug in your 2008-2017 Accord, Odyssey, or Pilot without any adapter or thread-chaser step.

Reviewers mention that after installing these on a 2012 Honda Odyssey EX-L, the engine immediately felt smoother and the responsiveness improved noticeably. The plugs weigh 6.4 ounces total and come as a 6-pack with a 12-month warranty, which gives you a solid safety net if the gap happens to be off on arrival. Unlike the BDFHYK sets below, this one uses a finewire tip combined with laser-welded technology that the maker says boost fuel efficiency by reducing the voltage required to jump the gap.

The only real trade-off is that this brand is less established than NGK or DENSO, so if brand recognition matters to you, the NGK below carries more aftermarket history.

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The factory-standard choice for a 3.5L V6 that already has high miles.

NGK is the brand many dealerships install, and this Laser Iridium set brings a double precious metal construction — a fine-wire iridium center electrode and a platinum ground electrode — so both sides of the spark gap resist erosion over time. The 14mm x 1.25mm thread size and 0.04-inch pre-gap match the 2008-2017 Accord 3.5L V6 exactly, which means you can torque these in without re-gapping. The trivalent metal plating on the shell gives it anti-seizing and anti-corrosion properties, so when you pull them out 100,000 miles later they are less likely to weld themselves to the cylinder head.

One buyer who owns a 2008 Accord V6 confirmed these are pre-gapped and easy to install, calling them the best spark plugs for that engine with extremely long life. Another reviewer noted that while the plugs work perfectly, the cost is noticeably higher than off-brand alternatives — a fair trade-off if you prefer the confidence that comes with a brand that supplies OEM parts. The unit weight is 11.52 ounces for all six, and the packaging includes genuine NGK labeling with the manufacturer part number 4024127723.

The honesty trade-off here is that at a higher price than the A-NAFTULY set, you are paying largely for the NGK name and the longer proven track record. For a 2008 Accord that you plan to keep for several more years, the extra spend buys materials that resist corrosion better during long install intervals, but for a quick misfire fix on a tight budget the BDFHYK set will do the same job for far less.

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The 93175-coded six-pack that covers Honda, Ram, Dodge, and Jeep with one box.

If your 2008 Accord has the 3.5L V6, the correct OE cross-reference is 93175 (also listed as LKR7DIX11S), and this BDFHYK set carries that exact code. It uses the same iridium electrode material and copper-core construction as the ILZKR7B11 set above, but with the different thread reach and heat range tuned for the larger V6 combustion chamber. The maker says the economic service life reaches 40,000-60,000 kilometers, with a claimed improvement in fuel efficiency and reduced exhaust emissions.

One buyer who installed these on a Dodge vehicle noted they worked as expected with no issues after a couple weeks. Another reviewer specifically mentioned making sure the plugs are gapped at 0.044 inches, which suggests you should double-check the gap before installation even though the plugs are marketed as pre-gapped. The ceramic insulator is isostatically pressed, which gives it high thermal resistance and good insulation against voltage leaks that can cause misfires.

However, the A-NAFTULY uses a 0.6mm finewire tip that concentrates spark energy more tightly, whereas this BDFHYK uses a standard iridium tip that is slightly thicker.

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A hybrid metal design engineered to last 80,000 to 100,000 miles in a 2.4L.

This A-Premium set uses both iridium on the center electrode and platinum on the core, creating a dual-metal construction that resists erosion on both firing surfaces. The manufacturer recommends a replacement interval of 80,000 to 100,000 miles, while a standard iridium-only plug typically lasts 40,000 to 60,000 kilometers (25,000 to 37,000 miles). The OE cross-reference is 5787 / ILZKR7B-11S, which matches the 2.4L engine in the 2008-2012 Accord, along with the Civic, CR-V, Crosstour, and Acura ILX and TSX models of the same era. The gap is factory-set at 0.044 inches and the hex size is 5/8-inch, so a standard spark plug socket fits without adapters.

Owners mention that this set made their car “run like new” immediately after replacement, with one reviewer saying the car runs better than ever. Another noted that the product is good quality with no problems. The included 12mm thread diameter and 26.5mm reach are identical to the factory specs for the 2.4L engine, which means no risk of the plug protruding too far into the cylinder and hitting the piston. The resistance is rated at 5000 ohms, which matches the suppression level the ignition system expects to avoid radio interference.

Unlike the 6-packs above, this set contains only 4 plugs because the 2.4L four-cylinder engine needs exactly four. If you mistakenly buy the 4-pack for a 3.5L V6, you will come up two plugs short.

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The thinnest iridium tip in this roundup, at just 0.4mm, for maximum spark energy.

DENSO is one of the world’s largest OE suppliers, and this Iridium Power plug uses a 0.4mm iridium tip — the thinnest of any plug reviewed here. That tiny tip concentrates the spark energy into a very tight point, which means less voltage is required to jump the gap and the flame front spreads faster across the air-fuel mixture. The ground electrode features a tapered cut and a U-Groove design that helps expose more of the spark to the fuel charge. The 0.89mm gap (roughly 0.035 inches) is slightly tighter than the 0.044 inches common on other plugs, which can improve idle stability at the cost of slightly more frequent replacement.

Customers note that the plugs offer great value and quick shipping, with one reviewer confirming performance was excellent. However, one reviewer noted that this set was NOT the exact fit for a 2010 Accord 2.4L and gave it 3 stars. That mismatch is worth flagging: the Amazon fitment guide says it is compatible with the 2008-2012 Accord 2.4L, but the real-world fit appears inconsistent for some model-year variations. The thread size is M14x1.25, which is larger than the standard 12mm thread used on many Honda 2.4L engines. This raises a real fitment risk — if the thread diameter does not match your cylinder head, the plug will not thread in at all.

Because of the fitment uncertainty and the fact that this is a 4-pack intended for the 2.4L engine, it makes sense only if you have already confirmed the M14 thread matches your specific Accord head casting. If it fits, the 0.4mm tip delivers genuinely sharper ignition than any other plug here, but the risk of buying the wrong thread size makes it a gamble compared to the guaranteed-fit ILZKR7B11 sets.