Kohler toilets are excellent products. They often are marked on both the tank and the lid with part numbers. The tank will often have four lines of numbers, and one of those lines is the part number, usually in the format Kxxxx where the x's represent numbers. The other three lines include a date code and plant/manufacturing/lot codes.
Depending on the age of the toilet, there may or may not be a sticker on the underside of the lid. If there is a sticker, the part number on the sticker is actually just the sticker's part number, not the tank lid part number. They often use the same sticker on different tank lids, so you will need to remove the sticker to reveal if it is stamped with a tank lid part number.
Kohler products went through a transition at some point. They used to use a number similar to the tank, Kxxxx. Eventually they changed their tank lids to use a number that starts with an 8. Many products were then given the original K number and the new 8 number. In most cases if there is a new and an old number listed on this site, the old number was the one you are most likely to find on the toilet tank lid, and the new number was one that they used in their spec sheets. Now they use 10xxxxxx numbers as well for toilet tank lids.
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Manufacturer: KOHLER
New Lid P/N: 1000832
Old Lid P/N:
Lid Size: 20.5" x 10"
Tank P/N:&nbs..
$150.00
Manufacturer: KOHLER
New Lid P/N: 1001739
Old Lid P/N:
Lid Size: 18.25" x 8.25"
Tank P/N:&..
$80.00
Manufacturer: KOHLER
New Lid P/N: 1006066
Old Lid P/N:
Lid Size: 16.625" x 6.75"
Tank P/N:..
$55.00
Manufacturer: KOHLER
New Lid P/N: 1010658
Old Lid P/N:
Lid Size: 18" x 8"
Tank P/N: One pi..
$65.00
Manufacturer: KOHLER
New Lid P/N: 1010702
Old Lid P/N:
Lid Size: 18.25" x 8"
Tank P/N: K34..
$65.00
Manufacturer: KOHLER
New Lid P/N: 1015137
Old Lid P/N:
Lid Size: 16.75" x 7.875"
Tank P/N:..
$70.00
Manufacturer: KOHLER
New Lid P/N: 1015781
Old Lid P/N:
Lid Size: 17.5" x 8.125"
Tank P/N: ..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1015867
Old Lid P/N:
Lid Size: 18.75" x 8.125"
Tank P/N:..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1016946
Old Lid P/N:
Lid Size: 19.25" x 8.25"
Tank P/N: ..
$75.00
Manufacturer: KOHLER
New Lid P/N: 1021921
Old Lid P/N:
Lid Size: 17.375" x 7"
Tank P/N:&nb..
$70.00
Manufacturer: KOHLER
New Lid P/N: 1032188
Old Lid P/N:
Lid Size:
Tank P/N: K4608
Ta..
$65.00
Manufacturer: KOHLER
New Lid P/N: 1033723
Old Lid P/N:
Lid Size: 18" x 9"
Tank P/N: K4383,..
$65.00
Manufacturer: KOHLER
New Lid P/N: 1036367
Old Lid P/N:
Lid Size: 17.5" x 7.25"
Tank P/N: K..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1036375
Old Lid P/N:
Lid Size: 21.25" x 8.875"
Tank P/N:..
$65.00
Manufacturer: KOHLER
New Lid P/N: 1044820
Lid Size: 17" x 8"
Tank P/N: K4438, K4708
Tank Size: 1..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1045184
Old Lid P/N:
Lid Size: 15.5" x 7"
Tank P/N: ..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1046467
Old Lid P/N:
Lid Size: 18" x 8.25"
Tank P/N: K44..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1052066
Old Lid P/N:
Lid Size: 14" x 7"
Tank P/N: K4419
..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1052861
Old Lid P/N:
Lid Size: 17.25" x 8.5"
Tank P/N: K..
$75.00
Manufacturer: KOHLER
New Lid P/N: 1052862
Old Lid P/N:
Lid Size: 17.25" x 8.5"
Tank P..
$75.00
Manufacturer: KOHLER
New Lid P/N: 1055954
Old Lid P/N:
Lid Size: 19" x 10"
Tank P/N: One P..
$65.00
Manufacturer: KOHLER / Sterling
New Lid P/N: 1068490
Old Lid P/N:
Lid Size: 17.625" x 8.75"..
$60.00
Manufacturer: KOHLER
New Lid P/N: 1070414
Old Lid P/N:
Lid Size: 16.5" x 9"
Tank P/N: K447..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1080568
Old Lid P/N:
Lid Size: 12.25" x 6.5"
Tank P/N:
..
$60.00
Manufacturer: KOHLER
New Lid P/N: 1081363
Old Lid P/N:
Lid Size: 11" x 5"
Tank P/N:
Tank ..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1086929
Old Lid P/N:
Lid Size: 17.75" x 8.125"
Tank P/N:..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1101882
Old Lid P/N:
Lid Size: 12.25" x 7.25"
Tank..
$55.00
Manufacturer: KOHLER
New Lid P/N: 1101883
Old Lid P/N:
Lid Size: 12.25" x 7.25"
Tank..
$50.00
Manufacturer: KOHLER
Lid P/N: 1126374
Lid Size:
Tank Size:
..
$55.00
Manufacturer: KOHLER
New Lid P/N: 1138565 (lid may also be marked 11386656)
Old Lid P/N:
Li..
$55.00
Manufacturer: KOHLER
New Lid P/N: 1145223
Old Lid P/N:
Lid Size: 17.75" x 10.375"
Tan..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1145294
Old Lid P/N:
Lid Size: 19.25" x 8.5"
Tank P/N: K..
$60.00
Manufacturer: KOHLER
New Lid P/N: 1146775
Old Lid P/N:
Lid Size: 16.75" x 8.25"
Tank P/N: ..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1160268
Old Lid P/N:
Lid Size: 18.875" x 9.75"
Tank P/N:..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1180586
Old Lid P/N:
Lid Size: 16" x 8"
Tank P/N:
..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1182368
Old Lid P/N:
Lid Size: 16" x 6.75"
Tank P/N: K51..
$75.00
Manufacturer: KOHLER
New Lid P/N: 1211811
Old Lid P/N:
Lid Size: 17.5" x 9.5"
Tank P/N: 53..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1282458
Old Lid P/N:
Lid Size: 18" x 8.625"
Tank P/N: 41..
$50.00
Manufacturer: KOHLER
Lid P/N: 1324740
Lid Size:
Tank P/N:
Tank Size:
Toilet..
$50.00
Manufacturer: KOHLER
Lid P/N: 1346865
Lid Size: 18.125" x 8.625"
Tank P/N: K 23158
Tank Size: ..
$50.00
Manufacturer: KOHLER
New Lid P/N: 1357943
Old Lid P/N:
Lid Size: 18.25" 8.5"
Tank P/N: F78..
$55.00
Manufacturer: KOHLER
New Lid P/N: 80424
Old Lid P/N: K4559
Lid Size: 13.25" x 8"
Tank P/N: K4504..
$75.00
Manufacturer: KOHLER
New Lid P/N: 80469 or 81187
Old Lid P/N: K4552
Lid Size: 22" x 8.375"
Tank ..
$70.00
Manufacturer: KOHLER
New Lid P/N: 80471
Old Lid P/N: K4558
Lid Size: 20.25" x 8.625"
Tank P/N: K..
$65.00
Manufacturer: KOHLER
New Lid P/N: 80576
Old Lid P/N: K4592, K4591
Lid Size: 18.625" x 8.5"
Tank ..
$75.00
Manufacturer: KOHLER
New Lid P/N: 80625
Old Lid P/N: K4565
Lid Size: 19.625" x 8.625"
Tank P/N: ..
$70.00
Manufacturer: KOHLER
New Lid P/N: 81180
Old Lid P/N: K4530
Lid Size: 19.75" x 7.625"
Tank P/N: O..
$55.00
Manufacturer: KOHLER
New Lid P/N: 81449
Old Lid P/N: K4471
Lid Size: 21" x 10.5"
Tank P/N: ..
$85.00
Manufacturer: KOHLER
New Lid P/N: 81509
Old Lid P/N: K4556
Lid Size: 21" x 8 1/2"
Tank P/N: K452..
$50.00
Manufacturer: KOHLER
New Lid P/N: 81804
Old Lid P/N: K4623
Lid Size: 15" x 7"
Tank P/N: K3434AA ..
$75.00