Front Left Brake Caliper - 1991 300ZX Z32

The 1991 Nissan 300ZX Twin Turbo utilizes a Sumitomo-manufactured aluminum four-piston front left caliper assembly, OEM reference 41011-40P00 (superseded by 41011-40P01 for 1994-1996 production). When junkyard hunting, restrict searches to 1990-1996 Z32 chassis equipped with the VG30DETT; naturally aspirated models employ incompatible cast-iron two-piston calipers with distinct mounting geometry. Inspect carefully for aluminum oxidation pitting around piston bores—a prevalent failure mode in road-salt regions that compromises seal integrity. Verify bleeder screw operability and slide pin movement before extraction, as seized components often render used units non-serviceable. During installation, always replace crush washers and torque the banjo bolt to 18 ft-lbs; aluminum caliper bodies crack easily if over-tightened. Look for casting marks "40P00" or Sumitomo logos to confirm authenticity, but physically verify left-hand orientation against your core—right-side units (41001-40P00) are mirror-image and non-interchangeable.