Subaru 21236AA010 — Thermostat Gasket
Overview
Thermostat gasket Subaru 21236AA010 seals the thermostat housing against the water pump body within the engine cooling system, preventing coolant leaks and loss of system pressure. Featuring a channelled C-section profile, this rubber seal fits around the outer rim of 54 mm diameter thermostats. Manufactured from EPDM elastomer, the component resists ethylene glycol, oil, and operating temperatures from -40 °C to +130 °C. Precise dimensions yield a tight joint without chemical sealants. Specifications: inner diameter 50 mm, outer diameter 62 mm, wall thickness 5.5 mm. OEM reference numbers include 21236AA010 and 21236AA000.
This seal fits Subaru Forester SF, SG, SH, SJ, Impreza GC, GD, GH, VA, Legacy BD, BE, BL, BM, Outback BG, BH, BP, BR, and XV GP models equipped with 1.5, 2.0, 2.5, and 3.0 litre EJ and FB series engines produced between 1992 and 2020. Replacement is required during thermostat servicing, coolant flushes, water pump replacement, or when coolant weeping occurs at the housing joint. Thermal cycling causes the original elastomer to harden, flatten, and crack over time. Fitting a new genuine seal restores full hydraulic integrity to the primary cooling loop and prevents engine overheating during vehicle operation.
Subaru 21236AA010 — thermostat gasket. 4 offers available, starting from 13.49 USD.
Specifications
Manufacturer — Subaru. Article number — 21236AA010. Name — Thermostat Gasket. Offers — 4. From — 13.49 USD.
Compatible cross-references
Replacements and analogues: Subaru 21236AA000, Subaru 21236AA000, Ajusa 00520000, AJUSA 00520000, EPS 1890600, GKN 25286, Mitsubishi MD315301.
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