Product review (1 stars): Read Consumer Reports on the worst 395 reviews of Thrmador products
I have owned the predecessor of this range, the PRG364GDUS for 16 years.  About year 2 it started malfunctioning, with the left rear burner no longer igniting, even though there was spark.  The oven mother board had to be replaced twice over the years.  Recently, the left front burner refused to ignite.  Spark, but no gas, which meant the gas relief valve had stopped working.  I was never able to fix the left rear burner and now the left front burner because the venturi tube has fused to the burner and cannot be unthreaded which means I cannot get to the elements that need repair.  The basic problem is that the venturi tube is brass and the burner itself is aluminum or some other type metal, which when heated together, will fuse the two elements, making removal of the top plate impossible.  There is absolutely no way to repair this stove, which in 2000 cost over $5000.  Thermador customer service was of absolutely no help and stonewalled me when I tried to have them assume responsibility for a major manufacturing error.  Read Consumer Reports on the worst 395 reviews of Thrmador products.  Buyers be aware