Understand thermal control valve, diagnostic purpose, limitations, and the vehicle details to verify before buying.
No product, current price, exact vehicle fit, or repair outcome has been verified in this research set.
The source is a research lead, not a current SKU, price, supersession or exact VIN fitment check. Confirm the current manufacturer parts catalog and retailer listing before any purchase.
Read the Honda original: 25-020 Source date: 2025-02-14; research checked: 2026-11-01.
Why a code is not a part order
First confirm the fault, then match the exact year, VIN, engine, equipment and current OEM number. An old bulletin part number is not a current fitment approval.
Fitment fields to verify
- engine/VIN
- revised design identification
- part date/supersession
- required seals
Skill and safety boundary
PRO_ONLY
Warranty and recall first
Check an open recall and the vehicle warranty before paying for a part. No sales link is shown without current exact-fit evidence.
Sources and scope
- Honda — 25-020 Document: 2025-02-14 · Research checked: 2026-11-01
- Subaru — 09-80-21R Document: 2024-04-01 · Research checked: 2026-11-01
Research snapshot: 2026-11-01. Source documents may have newer revisions. Verify current instructions and VIN eligibility with the manufacturer.