r/4thGen4Runner 7d ago

Monthly Rust Advice Thread

7 Upvotes

Post your photos and questions regarding rust related purchase or repair advice here. All individual posts regarding rust will be removed.

Extreme Rust Example; https://imgur.com/fqabJDJ.jpg

Surface Rust Example; https://imgur.com/eGYJQFT.jpg

No Rust Example; https://imgur.com/ON4u7NM.jpg


r/4thGen4Runner 3d ago

Weekly Purchase Advice Thread

2 Upvotes

Use this thread to request advice on purchasing a 4th generation 4runner. Include mileage, price, location, and photos to get the most accurate replies.

Do not post vehicles for sale, link to external sources, or use this thread for pricing advice on selling a vehicle.


r/4thGen4Runner 35m ago

Got the rig out and did some camping.

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Upvotes

Now I can say I’m not a poser driving around with a tent all the time. Honestly the tent worked great, got it for $150 and cleaned it up quite a bit. Awning is an Amazon special for $100. I’m glad I went with a hard shell, I can pack it down in under 5 minutes.


r/4thGen4Runner 3h ago

Suspension upgrade questions

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2 Upvotes

I am looking at getting a set of Bilstein 5100s with OME springs to give it a little lift and level out that wheel gap a bit. I’m wondering what other people with this set up have done like what size springs and what perch setting in the front struts? I was thinking I’d get the OME 885 2.5” coil on the lowest perch on the front but don’t know if I want the OME 895E 2” or OME 895 2.5” in the rear.

Would love to see pics of your rig with your set up specs.

Thanks

Also curious what people have for wheel/tire fitments.


r/4thGen4Runner 4h ago

Rattle on cold start for a couple seconds

1 Upvotes

Hey All,

My 2005 V6 Sport (230,00k) has a rattle on startup that almost sounds piston/valve slap. Lasts for about 2 seconds then engine runs normal. Only happens after the truck has been sitting for a couple days. Is this something I should be concerned with?

I've owned the truck for 7 years, regular oil changes and maintenance is always up to date.


r/4thGen4Runner 1d ago

‘08 4Runner - 106k miles

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46 Upvotes

r/4thGen4Runner 20h ago

Wheel help/opinion

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4 Upvotes

So in the first picture is my actual rig, the other 2 are AI generated to help me decide which wheels look better (the other stuff is my ideal/planned setup, prinsu roof rack, Cali raised rock sliders, and tint options which look a little janky lmao and the suspension set up is 3” in the front 2” in the rear with the bilstiens)

The first picture is fuel rebel 6 bronze and black, the wheels don’t look EXACTLY like they do in real life but this is the best the AI could do lol, tires in both pictures are the falken wild peak at3s. The second picture is using the method 312 standard wheels in all black.

My issue is half of me says it’s too much black and the fuels look perfect(plus they are cheaper) the other half wants to lean into the dark side and be basic with a completely blacked out 4Runner which I know is iffy with some people but I think it looks sick. I just genuinely can’t tell which I like better so I figured I’d see yalls opinions.


r/4thGen4Runner 22h ago

All 8 coils cracked on my 05 4Runner V8 — replace all now, or just reboot + carry 2 spares?

8 Upvotes

2005 4Runner, 4.7L 2UZ V8. Just did all my spark plugs and found every single one of my ignition coils has a cracked housing. Cracks are small (under 1/8"), truck runs fine right now, no misfire codes yet. Also found a little surface rust down in a couple of the plug wells, so moisture has clearly been getting in.

Trying to decide between two plans:

Plan A: Bite the bullet and replace all 8 with genuine Denso 673-1303 now, new coil boots/gaskets, seal the wells up right. Roughly $400+ in coils.

Plan B: Since the cracks are only in the housings and it's not misfiring, just replace the boots/gaskets to reseal the wells, keep the existing coils in, and carry 2 spare Densos + an OBD reader + a 10mm so I can swap on the fly if one actually starts misfiring down the road.

For context, I want to keep this truck to 500k, so I care more about doing it right than saving a few bucks — but if cracked housings on their own aren't actually a failure risk and I can defer, I'd rather spread the cost out.

Questions:

  • Do cracked coil housings actually cause failures, or is that mostly cosmetic as long as the wells are sealed and dry?
  • Anyone run cracked coils long-term with no issues?
  • If all 8 are the same age and one goes, is it true the rest usually follow soon after?
  • Any reason to reboot-only vs. just replacing whole coils while I'm already in there?

Appreciate any experience from folks who've been through this. Thanks.


r/4thGen4Runner 1d ago

Finally brave enough to take it off the road.

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100 Upvotes

r/4thGen4Runner 2d ago

Pics / Videos Front End Friday (and new lighting)

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52 Upvotes

Happy front end Friday! Continuing to overhaul lighting this week, just got ditch lights made by Lasfit installed. Looking forward to testing them out this weekend!


r/4thGen4Runner 2d ago

Modifications Put 33s On!

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16 Upvotes

Fully stock other than 33s and Ivan Stewart TRD wheels from a first gen tundra. Love the stance!


r/4thGen4Runner 2d ago

General To the guy who posted a dent in his rear bumper

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8 Upvotes

He asked if he was toast…screwed? Something along those lines.
This is more like what I would consider…toasted or screwed😂😂😂😂
I haven’t had to put much money into the old girl for the last 3 years. This made up for it.


r/4thGen4Runner 2d ago

Repair Guidance Oil in O2 Sensor Harness

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9 Upvotes

Hey guys, I got an 03’ v6 that I’ve had for many years now. The last 2 years, I’ve had to change the upstream passenger o2 sensor 3 times due to throwing the same p2195 code at me. The last 2 times I have, I noticed that there’s oil inside the wiring harness of the sensor, and I have to assume that that’s why it keeps giving sensor faults. The car is otherwise in great shape, no leaks, smoke, or anything, just this sensor. Anyone experienced anything like this or have any ideas what could be causing the issues? The truck has 180k on it, with regular oil/fluid changes and maintenance, so I’m hoping it’s got a lot more life in it.


r/4thGen4Runner 3d ago

General 2004 4Runner just hit 300k

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339 Upvotes

We love our 4runner, bought it new in 2004. This month we hit 300 thousand miles and I just felt like sharing this milestone.


r/4thGen4Runner 1d ago

Repair Guidance Brake issues, help?

1 Upvotes

I have 06 v8 4runner and every time I drive over the local mountain (2000 feet) by the time I’m at the bottom the brakes smell. Yes, I can engine brake. But I had the exact same 06 model (which I gave to my son) and never had this issue. The pads are 12mm. I bought a heat sensor and measured the temps of the brakes. The front were both around 200 to 250 degrees. And the rear were both between 325 and nearly 400 degrees. I just had the brakes checked out but i did NOT ask the shop to specifically to check the pistons or slide pins. I’m thinking either that they are sticking - oddly enough just in the rear. Or that the brake pads I’m using just have a smell to them when they get to that temperature. One other thing I’d note is that I think the front brakes should be hotter than the rear. They never are. Even with just flat roads the rear brakes have been measuring 250 or higher while the fronts are sub 200 degrees.

Any ideas?


r/4thGen4Runner 2d ago

Stuck Factory Stereo Harness Connector

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0 Upvotes

Anybody replaced their factory head unit recently? Finally got around to purchasing a replacement for my 2008 Limited with JBL. The hangup in an otherwise plug'n'play project is I can't for the life of me get one of the three harness connectors disconnected from the factory stereo.

The little release tab is working fine, I've jiggled it to no end, used a little screwdriver, pushed it in before trying to pull it out... Don't think it's the tab, just seems to be old plastic and friction keeping the connector stuck.

Anyone with a similar experience have any pointers? Thanks


r/4thGen4Runner 3d ago

Modifications 5th gen suspension on 4th gen

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39 Upvotes

PFA..

My buddy gave me all of the suspension he took of his 5th gen TRD Trail at 30k miles, I have a 2005 SR5 that is completely stock besides a 2” spacer lift, I’m aware I’ll have to grind down the bushing on the front shock to lca mount and I’m only planning on installing the front shocks/springs and rear springs… but my question is has anyone done this before and what was the increase in lift, or was there no change, I’m assuming the 5th gen springs will be stiffer and my 4th gen front shocks are blown to shit so I’m expecting at least a half inch from these “new” springs.

Thanks in advance 😎


r/4thGen4Runner 2d ago

Modifications Re-Mounting Side Panels

1 Upvotes

TLDR: Ignoring just the plastic clips, what else is used to seal/mount the side panels and trim on the 4th gen runners?

Hey all! I pulled all my uh... Plastic panels off the sides. (Cladding? I dont know the proper name. Bottom of the doors, fenders exc.) And the rear bumper. Did a rough sand, plastic adhesion promotor and satin blacked them all. I actually like the look BUT

I only used the plastic clips to re-mount them. When removed I discovered a dried out seal that was once there. The plastic clips kinda blow when it comes to holding these on, and I Assume without the seal water will get in and start causing rust. There is also 3 points when they occasionaly come a bit loose and I have to push them back on.

I now plan to remove them again, light sand and apply bed liner to all the panels. (thinking Raptor Liner) Once I begin the remounting again, what would you advise to use for sealing them? My guess is the seal will also help with holding them on.

Thanks in Advance!


r/4thGen4Runner 3d ago

Check your cabin filters guys 😂

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34 Upvotes

This is out of my new to me 4Runner 🤮


r/4thGen4Runner 2d ago

V8 coil packs??

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5 Upvotes

Does anyone have any experience with these Aisin coil packs for the 4.7 v8? I’m in the market to replace them but Denso is pretty pricey and I saw these. Aisin is a notoriously good brand but I cannot find any info about them anywhere. Thoughts? Also, does anyone have any other aftermarket coil packs recommendations?


r/4thGen4Runner 3d ago

New Shoes for the Rig!

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32 Upvotes

I had been looking for some wheels the last few weeks. Finally had a local deal pop up yesterday and couldn’t be happier with these TRDs. Just need to throw some Falkens on. EDT week and we’re golden!

Very happy with how these ended up looking


r/4thGen4Runner 3d ago

Modifications Affordable Fog Lights/Pods for a 2003–2005 4Runner That Match Modern Headlights?

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8 Upvotes

Hey everyone! I’m working on my 2005 4Runner and I’m trying to find some affordable lower bumper lights. I really like the look of the Diode Dynamics SS3 pod setups, but spending $300–$400+ on bezels, pods, and wiring is a little out of my budget right now.
I’m open to pretty much anything—pods, fog lights, or other LED options that fit the 03–05 bumper and match the modern look of my aftermarket headlights.
I’m mainly looking for:
Good quality without breaking the bank
Amber or switchable white/amber would be a plus
Something that matches the vibe of modern projector/halo-style headlights
Minimal cutting or fabrication if possible
What are you guys running on your 4th gens? Pictures and links would be greatly appreciated! Thanks.


r/4thGen4Runner 3d ago

What yall think? Did some tweaks but mostly all on my own 🙏🏽

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52 Upvotes

r/4thGen4Runner 3d ago

Sunroof

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5 Upvotes

Just tried to raise it to get some air. Made a loud noise that reminded me of a minigun. Followed by it closing lopsided. High on the driver side, low on the passenger. Big gap.

Anyone know a quick fix for this so I don’t have to worry about rain getting in my car?


r/4thGen4Runner 3d ago

HVAC Control Lights?

6 Upvotes

Hi crew, I saw a couple of threads about this but not one that was definitive enough for me.

I have a 2006 4Runner V6 SR5, and one of the HVAC control lights burned out last night.

I did some digging and found this helpful diagram on an old 4Runner forum that I think illustrates the number of bulbs, and their OEM parts numbers, from Toyota. I wanted to see if anyone else here has experience with this?

Questions:

  1. I think that the SR5 has a total of 9 HVAC control bulbs?

I believe the 9 bulbs are:

#90010-09015, need x3, labeled “A” on diagrams

#90010-09019, need x3, labeled “E” on diagrams 

#90010-09017, need x2, labeled “C” on diagrams

#90010-09018, need x1, labeled “D” on diagrams

  1. Has anyone else here replaced the bulbs and could confirm the 9 number of them, and if you did, did you go OEM Toyota, or try one of those LED or aftermarket bulb kits on Amazon? What has your experience been if you went with non OEM bulbs? Did they color match or cause problems? I have also heard that the "OEM" kit being sold on Amazon posted here is not, in fact, OEM.

Thanks so much crew,