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2019 Nissan Altima
2019 Altima spark plug numbers, nominal gaps, and firing order 1-3-4-2 for the PR25DD and the KR20DDET. The manual says a dealer should replace them.
Difficulty, time, and cost are estimates when this guide gives them. Torque is a cited figure, or it is left off.
Main source: 2019 Altima Sedan Owner's Manual, spark plugs and engine specifications (opens in a new tab), Nissan North America, Inc., published 2019-01-01, read 2026-10-15.
Numbers on this page come from the cited source. Match the engine before you use a capacity or a torque. Do not work under a vehicle held only by a jack.
Nissan dealer
The spark-plug section says if replacement is required, visit a Nissan dealer. Do not clean or regap iridium plugs.
| Item | Figure | Where it comes from |
|---|---|---|
| PR25DD plug | DXE22H11C. Nominal gap 0.043 in (1.1 mm). | Engine specifications |
| KR20DDET plug | DILKAR7N9HG. Nominal gap 0.035 in (0.9 mm). | Engine specifications |
| Firing order | 1-3-4-2 on the PR25DD and on the KR20DDET. | Engine specifications |
PR25DD
KR20DDET
Firing sequence from the 2019 Altima owner's manual engine specifications. Sequence only.
Illustration, not to scale; confirm with your owner's manual. This is the firing sequence only. It does not show where each cylinder sits on the engine.
Source for this drawing: 2019 Nissan Altima Sedan Owner's Manual, engine specifications, models PR25DD and KR20DDET.
The do-it-yourself section says iridium plugs last longer than conventional plugs, and that if replacement is required it is recommended that you visit a Nissan dealer.
The PR25DD lists DXE22H11C with a nominal gap of 0.043 in (1.1 mm). The KR20DDET lists DILKAR7N9HG with a nominal gap of 0.035 in (0.9 mm).
Both engines list firing order 1-3-4-2. The drawing repeats that sequence. It does not show cylinder positions.
Idle speed, ignition timing, and CO at idle are listed as no adjustment necessary. Those lines are not a plug-gap instruction.
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Nissan dealer
The spark-plug section says if replacement is required, visit a Nissan dealer. Do not clean or regap iridium plugs.
2019 Altima owner's manual (opens in a new tab)Search Amazon.com (affiliate link) (opens in a new tab)
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These guides cover the same kind of work. Their numbers belong to those vehicles, not to this one.