This page lists 3 electrical switch & relay parts for the 2021 International CV, across 3 part types, covering the 6.6L V8 DIESEL Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2021 International CV, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 3 listed parts are A/C System Relay (1 part), Oil Pressure Sender / Switch (1 part) and Trailer Brake Switch (1 part).
Every part on this page is matched to the 6.6L V8 DIESEL Turbocharged — the only engine offered in the 2021 International CV.
The most listed brands for 2021 International CV electrical switch & relay parts are DORMAN (2 parts) and UAC (1 part).
Each part number listed for the 2021 International CV opens a page with every vehicle that part fits.
A/C System Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | RE8434C | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the relays that control the A/C System circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
This group shows a single part: UAC RE8434C.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 926397 | 🇺🇸 US 🇨🇦 CA | 3 Way with Leadswith Flat Connector | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
This group shows a single part: DORMAN 926397.
Trailer Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 601237 | 🇺🇸 US 🇨🇦 CA | OE FIX | View on Amazon |
This table covers the Trailer Brake switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
One part is listed for the 2021 International CV — DORMAN 601237.
Buying Electrical Switch & Relay Parts for a 2021 International CV
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 6.6L V8 DIESEL Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: A/C System Relay and Oil Pressure Sender / Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 2021 International CV?
Our catalog currently lists 3 electrical switch & relay parts for the 2021 International CV across 3 subcategories and 2 brands, covering the 6.6L V8 DIESEL Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 2021 International CV?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 International CV was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 International CV?
Every part on this page is matched to the 6.6L V8 DIESEL Turbocharged engine. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 International CV
Electrical Switch & Relay Parts for Other International CV Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.