Rotted out rear end

[Billiam]

Originally Posted by kobe52

good headsup.

do you have a part number/s for the scion replacements?

4211052332

[IndestructibleYaris]

The only thing to prevent rust is oil or waxy oil spray. Think waste oil, woolwax, fluidfilm(smells like crap), etc. Never use paint or rubberized undercoating unless you're religiously using oil or wax overtop of it. Coming from an undercoating shop

[Billiam]

Originally Posted by IndestructibleYaris

The only thing to prevent rust is oil or waxy oil spray. Think waste oil, woolwax, fluidfilm(smells like crap), etc. Never use paint or rubberized undercoating unless you're religiously using oil or wax overtop of it. Coming from an undercoating shop

I wired brushed the exterior portions of the trailing arm welds then applied 2 coats of POR15 to them. Once that cured I flooded the inside of the trailing arms with Liquid Wrench Rust Inhibitor and let it sit for a day. Then I flooded them again the following day. After I installed the beam I took a foam paint brush and coated the exterior welds with the LiquidWrench. I do that every few months.

I'm going on 2 years since the axle replacement. Solid as a rock so far. My 16 year old inherited the car a few months ago. I'm confident the rear axle will out live his stint with this vehicle.

As for the paint application? POR15 isn't exactly your garden variety stuff. When applied correctly it's an excellent barrier against corrosion. I applied 2 coats to ensure there was zero opportunity for moisture to find it's way passed it. Besides...the exterior welds aren't really the issue. It's the debris that gets trapped inside the trailing arms. Once it reaches a certain level it tends to get wet and stay wet. So these things rot from the inside. The broken welds that you see from the outside are the byproduct of this rot.

[09GLH]

Hate to resurrect an old thread. THis just happened to my 09 HB. I bought a brand new rear axle beam from Stoystown Auto Wreckers. They had it bubble wrapped in a box with all new hardware (bolts). They're about 3 minutes from the Flight 93 Memorial in Pennsylvania, for reference.

Absolutely gorgeous part. Only $600 compared to the $1200+ Toyota wants for new OEM. Worth looking up if you're in the mid-Atlantic area. I searched car-part.com for a junkyard part but couldn't find any.

#4211052332

https://www.stoystownauto.com/

[Billiam]

3+ years later our Yaris is going strong on the Scion xD axle. $600 is what I paid for mine back in April '22. That included shipping from 300 miles away.

[Thebailliekid]

Was the axle beam you replaced have the abs sensors? I was looking for a replacement for mine and I was told since mine had rear abs sensors I could use a rear beam from a yaris that didn’t have sensors. Does that make any sense?

[WeeYari]

The ABS sensors are in the hubs, not the axle beam.

[Billiam]

This thread revival got me thinking. April made 3 years since I installed the used xD axle. I decided to check things a little closer. The outside looks perfect. But that does not tell the real story. As I have mentioned a few times, it's the inside that's the real story. That's where the rot develops. By the time it makes it way to the outside, it's too late. Corrosion has eaten it's way completely through the welds. So I decided to use my borescope and peak inside the trailing arms. I'm happy to report that all looks good. Flooding that area when the beam was out of the car with Liquid Wrench Rust Inhibitor has definitely helped.

[Billiam]

And I will add that availability has changed dramatically in the last 3 years. At that time there were zero new ones available. No dealership could guarantee when they would come in. One dealership told me at least 6-9 months...and that was a guess. Retail was $1200. There weren't really in aftermarket ones either. Luckily that has changed. Looks like OEM and aftermarkets are readily available.

And as reminder, the same axle is used in Prius C and Scion xD

[enviri]

you can also get a '12-18 yaris SE set up for rear disc brakes :P