Parts for TC121A — Sony
We found 13 parts confirmed to fit the Sony TC121A.
Compatibility table
| Part # | Part | Also fits | Reference price |
|---|---|---|---|
| 875920305 | 74HC193, IC | This model only | $15.21 · Amazon |
| 349013100 | Cassette Lid | This model only | $10.14 · Amazon |
| 03115525 | Com Ge Smart | This model only | $26.99 · Amazon |
| KIT1120 | Kit | This model only | $94.49 · Amazon |
| 31300706000 | Pressure Switch | This model only | $110.22 · Amazon |
| 110409 | Toro Height Adjus | This model only | $10.73 · Amazon |
| 156471911 | PIN CONNECTOR 3P | 3 models | $37.74 · Amazon |
| X35397160 | Arm Assy, Pi | 4 models | $8.19 · Amazon |
| X37011181 | Head | 13 models | $29.34 · Amazon |
| 882550600 | Head Erase | 27 models | $23.06 · Amazon |
| WR17X20862 | Refrigerator Water Filter Head | 27 models | $94.56 · Amazon |
| X35493141 | Motor | 31 models | $17.58 · Amazon |
| 790849 | Briggs & Stratton Lawn & Garden Equipment Engine Air Vane Spring | 39 models | $9.02 · Amazon |
Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.
Common failure areas on this model
The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.
General hardware and mounting parts
Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.
Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.
Parts in this group on TC121A: 875920305 (74HC193, IC), 349013100 (Cassette Lid), 03115525 (Com Ge Smart), KIT1120 (Kit), 110409 (Toro Height Adjus), X35397160 (Arm Assy, Pi), X37011181 (Head), 882550600 (Head Erase), WR17X20862 (Refrigerator Water Filter Head), X35493141 (Motor).
Controls, timers and wiring
Symptom: A cycle that doesn't advance, an unresponsive display, or the unit not starting at all.
Check: Look for burn marks or a burnt smell near the board or terminals, and check whether buttons and knobs respond -- a unit that powers on but won't cycle often traces back to this group.
Parts in this group on TC121A: 31300706000 (Pressure Switch).
Storage, trim and cosmetic hardware
Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.
Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.
Parts in this group on TC121A: 156471911 (PIN CONNECTOR 3P), 790849 (Briggs & Stratton Lawn & Garden Equipment Engine Air Vane Spring).
Before you buy
Match TC121A exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.
How to confirm this is your model
Check inside a door opening, on a back or side panel, or behind a removable panel or drawer for a label printed with the model and serial number. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.
Still not sure?
Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.