Master brake cylinder and booster, rotors.
The 4 cyl. engine is not up to the job of moving this sluggish beast. Passing can be hazardous to your health. Gas consumption wasn't wonderful. Major brake system component failure at 36000km was simply unacceptable, especially when Mazda took 6 weeks to find replacement parts.
Headlights were inefficient, body sheet metal was so thin you dared not lean against it. Tires were biodegradable.
Considering the previous generation of 626s this car deserved Gregory Peck's advice to Chairman Mao (in the movie "The Candidate"). When asked about the little red books, Peck said "Buy back every copy and burn it". Mazda should just recall this piece of nonsense out of goodwill.
My '94 626 4cyl/5sp. bought at 90,000; 110,000 now burns no oil (Mobil 1), good at high speed commuting. Comfortable for 6ft+. Good fuel mileage... 35mpg. Only bad thing so far: ignition module failed... but Mazda only sells entire distributor & no after market offerings!! (Why?). Wrecking yards picked clean. Very expensive (for owners) design engineering or bean counter decision. How much did they save?... They are not concerned about long term servicing costs. Makes me wonder what other hidden policy surprises are in this car. Brakes & timing belt; well arranged for service. Factory Service manual is poorly written. Not very reader friendly. NJ owner.