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Hyundai 21N4-00762 is the preheat timer relay: a sealed box with a short lead and a white multi pin plug. It is used on Hyundai R210-7 excavators. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Timer Relay |
| Replaces | Hyundai 21N4-00762 |
| Voltage | 24 V DC |
| Timer | 1 + 0.5 seconds |
| Fits | Hyundai R210-7, R215-7, R220-7, R225-7 and R350-7 excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 853641 |
| Country of Manufacture | China |
Hyundai machines
Check the part number on your old unit before ordering.
| Hyundai Part No.(SPM Part No.) | Fits |
|---|---|
| 21N4-00762(SPM-HEP-4558) | Hyundai R210-7, R215-7, R220-7, R225-7 and R350-7 excavators |
Function dead with good fuses
A starter, glow plug or fuel relay that has burned its contacts stops the circuit without blowing a fuse.
Clicking but no power
A relay that clicks but does not pass current has worn contacts and needs replacing.
Heat and vibration
Relays near the engine wear out from heat and vibration. Swap them during major services.
Fleet spares
Relays are cheap to keep on the van and quick to change on site.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (3 aftermarket sellers) | USD 36.59 to 36.89 | 30 Oct 2026 |
| FridayParts | USD 47.88 | 30 Oct 2026 |
| Buy Machinery Parts | USD 54.72 | 3 Nov 2026 |
| SINOCMP | USD 59.00 | 30 Oct 2026 |
| Spare Part Mart | USD 30.88 | Today |
Our price of USD 30.88 is 16% to 48% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
Yes, it was made for the Hyundai R210-7, and 4 more listed under compatible equipment. Check the old relay is marked 21N4-00762 or one of the cross references, because makers change parts between serial ranges.
On the Hyundai R210-7, there is no fixed interval. It is changed when it fails, and many fail from water in the plug or chafed wiring rather than wear.
A fault code for this circuit, readings that jump or stay fixed, or a part that does not respond with power at the plug.
Read the fault codes, then check the plug and wiring for corrosion or a broken wire. A wiring fault reads the same as a failed relay.
Yes. Many machines have 12 V and 24 V versions of the same relay. Check the old part or the machine plate before fitting.
No. It is an aftermarket relay made to replace the Hyundai 21N4-00762. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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