In the US, Magnuson-Moss is often referred to as "the lemon law" (a defective product that can't be repaired is colloquially called a "lemon"). Specifically, "the lemon law" refers commonly to cars that have issues the dealer didn't specify before the sale and will not/can not fix.
Problem is, the FTC requires you to have a lawyer file a lawsuit and coordinate your legal costs and representation with the FTC, generally requiring a lawyer specifically dealing in lemon law cases. I've been down this path with a defective cell phone (HTC Touch Pro) and trying to get my carrier to replace it, and it's impossible to find a lemon law lawyer that deals in anything besides used car sales.
As always, the law is well intentioned but enforcement is next to impossible, just like you said.
Problem is, the FTC requires you to have a lawyer file a lawsuit and coordinate your legal costs and representation with the FTC, generally requiring a lawyer specifically dealing in lemon law cases. I've been down this path with a defective cell phone (HTC Touch Pro) and trying to get my carrier to replace it, and it's impossible to find a lemon law lawyer that deals in anything besides used car sales.
As always, the law is well intentioned but enforcement is next to impossible, just like you said.