Power washing undercarriage- what to look for

[conesare2seconds]

I?d avoid using the pressure washer altogether. If you do, give special care to wiring looms. The plastic is brittle from age by now. If you do the wheel wells you will encounter the wiring for the ABS/wheel speed sensor. I?ve seen that wiring losing its insulation, flaking off, probably contributed to by brake heat.

[AirbusDriver]

I've heard, but no idea if it's valid, dry ice can/will remove factory applied undercoating...if that's important. NCRS types would be concerned, for sure.