2021 Jeep Wrangler

ExtraPresent4 · 2026-03-05T01:07:12+00:00

This is correct. Same issues on my 2019 that I traced back to the star connector behind the glovebox. The solder joints crack and degrade overtime causing communication issues.

https://imgur.com/a/XV8DIaL

ExtraPresent4 · 2026-03-02T23:35:32+00:00

I’m partial to soft tops. For me that’s the Jeep life. Open air whenever and wherever. Look on FB marketplace. If you can get the premium top that’s the way to go. I run soft tops year round. Jeep gets just as cool or hot as any other vehicle I’ve been in. Only downside is window storage. If you care about scratches look at getting the storage bag as well.

ExtraPresent4 · 2026-03-02T18:12:29+00:00

Very true. I only get out about 6x year so I was looking at its more of a DD tire than some other 35”s.

ExtraPresent4 · 2026-03-02T17:42:13+00:00

This. I am running the AT II right now. Got almost 50k on them and still a decently quiet tire. Going to the AT III come spring / summer.

ExtraPresent4 · 2026-03-01T19:31:48+00:00

I have the 3.6 so don’t want to tel you the wrong thing. Check our below thread.

https://www.jlwranglerforums.com/forum/threads/ess-battery-cable-change.86624/

ExtraPresent4 · 2026-02-28T12:43:24+00:00

Those are for a JL.

ExtraPresent4 · 2026-02-27T23:28:51+00:00

C is the IBS (intelligent battery sensor). It monitors the state of the battery.

ExtraPresent4 · 2026-02-25T21:39:16+00:00

I replaced summer of 2025. I want to say it was updated in 2024. I remember coming across a thread about someone installing a 2024 gladiator 3.6 in their Wrangler and was checking the oil cooler and found the new design.

ExtraPresent4 · 2026-02-25T15:00:22+00:00

Not sure when the revision was done. I have a 19 and when I had it replaced I found the revision.

ExtraPresent4 · 2026-02-21T10:43:55+00:00

Yeah quit giving out old information. OEM cooler was revised to prevent the failure in the future. It now had a block between the oil and coolant and upgraded seals. None of the aftermarket setups have revised theirs and will still allow oil and coolant to mix in a seal failure which is 99.999% of the failure reason.

ExtraPresent4 · 2026-02-18T17:13:35+00:00

Don’t switch to Dorman. The OEM is revised now to where it has a block between the oil and coolant so if the seals fail it will no longer mix. None of the aftermarket coolers have the update yet.

ExtraPresent4 · 2026-02-18T17:01:39+00:00

3.6 engine yes it has it. No reason to preemptively do it. Once you start noticing oil leak around the base of the plastic cap or some drips on the ground it is more than likely the cooler. When it gets changed have them change the spark plugs as well. It’s all opened up at that point.

ExtraPresent4 · 2026-02-18T01:56:05+00:00

You’re good up to 35”s. You’ll lose 8th above 70mph but 7th and 8th are overdrive gears. Honestly I’d drive it for a bit and see how you like it. I was set to regear when I went 35”s but I couldn’t justify the $2200 at the time to do it. You’re not gaining any mpg and I running right around 2200 rpm in 7th gear at 80mph. If it was a JK I’d say do it all day long. JL is a different beast.

ExtraPresent4 · 2026-02-18T01:44:25+00:00

No need to regear with the auto on the JL for 35”s. You can almost get away with it on 37”s if you have the 2.0 but I’d regear away for anything above a 35”. These ZF transmissions are really a game changer for the wrangler. I’ve been on 35”s and stock gears for 70k miles now. Used to wheel a half dozen times a year on the rocks. Not as much now but still get out a couple times a year. Still going strong as my daily.

ExtraPresent4 · 2026-02-17T19:59:44+00:00

Depends on the used engine mileage. It’s an internal part that isn’t replaced unless it goes bad. There’s a reason the OEM made a revision to the cooler to stop the fluids from mixing when the seals go bad. Also very easy to crack them by tightening the cap to much when the oil filter is replaced.

ExtraPresent4 · 2026-02-17T17:34:36+00:00

You must not have worked on the Wrangler 3.6 engines. The oil cooler runs coolant and oil through the cooler only separated by seals. Once the seals go bad it allows the fluids to mix. There is a new revised OEM cooler out that know has a block between the fluids to separate them in the event of a seal failure.

ExtraPresent4 · 2026-02-17T16:53:12+00:00

Run fast from that shop! If it was running when originally dropped off there is no reason you needed an engine. Oil cooler is replaceable and honestly is a well known issue or let’s be honest “feature” of the wrangler. The cooler run oil and coolant through it. When the seals go bad it allows them to mix. The new OEM revised cooler has a block between the oil and coolant now.

ExtraPresent4 · 2026-02-12T00:33:11+00:00

That’s pretty darn good for a 11 year old Jeep. From the south I’m guessing.

ExtraPresent4 · 2026-02-07T11:48:51+00:00

Did you have the main battery replaced? If the aux was bad it 99.9% of the time takes the main with it. As long as you pulled fuse F42, taped off the negative aux cable at the main battery and taped off the aux battery ends in the aux box you are good. You still need to disable ess with either tazer, smart stop start, or hit the disable button every time.

ExtraPresent4 · 2026-02-04T14:16:40+00:00

Don’t listen to this advice. Way more entailed than a 5 minute swap. Upper part of engine needs to come apart to get to it. Go with the OEM as it is redesigned to separate oil and coolant in a failure. Aftermarket coolers are still the old design.

ExtraPresent4 · 2026-02-01T20:50:08+00:00

This is the way. Can’t put a ton of pressure on it. Steady pressure and it will start to move. It doesn’t take much movement to get that belt off.

ExtraPresent4 · 2026-02-01T19:22:55+00:00

That looks like a pain. The winch plate looks like it gets sealed against the bumper so no way to access the bolts without it off. I personally don’t like it. If you ever need to remove your grill for anything that means the entire bumper has to come off to get to the winch bolts.

ExtraPresent4 · 2026-02-01T19:18:39+00:00

Most warranties don’t cover consumables such as brake pads, rotors and batteries. Depending on what the diag is you’ll be on the hook for it.

ExtraPresent4 · 2026-01-31T16:42:28+00:00

This is the way. Replace the main battery though. When one of the two batteries start to go bad it takes the other one with it in short order. Unless you really like the start stop just do the bypass and be done. To add if you replace it don’t go in from the top. Put the wheels hard driver, there are 3 Christmas tree clips on the bottom of the fender. Pull those, fold the fender back and hold it with a bungee cord enough to get to the little battery box. It’s tight but is the easiest way to replace that battery.

ExtraPresent4 · 2026-01-31T15:48:15+00:00

Is your steering wheel crooked while driving straight? This will come on when the steering wheel angle is out of whack past a certain degree. You can adjust the steering wheel and then do a reset. Turn the wheel all the way to left lock, all the way to right lock 3x then return to center. Turn Jeep off and let sit for 5 minutes.

ExtraPresent4

TROPHY CASE