How to Replace Spark Plugs 2004-2010 Toyota Highlander

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This video shows you how to install spark plugs on your 2004-2010 Toyota Highlander. Spark is one of the four required components for an internal combustion engine to run. If your spark plugs are failing, worn, or dirty, you may experience rough starts, rough idle, poor performance, or poor mileage.
This process should be similar on the following vehicles:
2001 Toyota Highlander
2002 Toyota Highlander
2003 Toyota Highlander
2004 Toyota Highlander
2005 Toyota Highlander
2006 Toyota Highlander
2007 Toyota Highlander
Tools you will need:
• 10mm Socket 1aau.to/oie/1AXAA00017
• 12mm Socket 1aau.to/ojQ/1AXAA00015
• 14mm Socket 1aau.to/ojQ/1AXAA00015
• Vacuum
• Bent Nose Pliers
• 3/8 Inch Air Impact Gun
• 5/8 Inch Spark Plug Socket
• Ratchet 1aau.to/okQ/1AXAA00016
• Torque Wrench 1aau.to/oge/1AXAA00044
• Drill
• Dielectric Grease
• 8mm Allen Wrench
• Razor Blade / Gasket Scraper 1aau.to/oT/1AXAA00280
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2001-2007 Toyota Highlander 1st Generation: • 2001-2007 Toyota Highl...
⚠ DISCLAIMER:
While TRQ strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. TRQ is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.

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[@mattseeger9452]

Some models have an additional 12mm bolt in a bracket against the firewall toward the driver's side. Even tighter fit than the passenger side one mentioned here

[@nyceguy7543]

Very well detailed and well explained.
The beauty of your video is that you showed every step you took as you removed and replaced parts. It was also possible to gauge the amount of effort required to deal with the different fasteners.
Others merely show dismantled parts, then begin to explain what they did, in the middle of the video.

[@GizmosShop]

Best vid yet

[@Norm100ful]

Excellent video. I appreciate that you showed both the disassembly and reassembly using torque specs.

[@MegaGoolsby]

Thank you for this excellent video! You were thorough in explaining every step, including torque pound specs. Also, I appreciate that you showed how to put it all back together. I think I can do this myself now, so thank you very much.

[@awong160]

Great video! I used this video to help my friend fix their car today. Only difference I found was that his car had 3 12mm bolts in the back of the intake manifold holding it to different brackets.

[@improveyourwoodwork11]

Excellent video. Thank you.

[@nastysoda9212]

thanks for this!

[@intertonyblue]

Why 18 foot pound the torque to snug the spark plugs? I saw only it says 13

[@RhuleBeans]

Great video. What size is that spark plug socket?

[@gerolejolegion8725]

is this procedure the same with 2012 highlander? thanks..

[@GizmosShop]

Did you say what the torque was set to on the spark plugs?

[@Bill-NM]

This is the 3.3L engine, correct? Thanks...

[@Bill-NM]

OK - oops - yeah - I see the 3.3 on the engine cover.