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Volvo 20718807 is the D7D engine wiring harness in black corrugated conduit with a rectangular main ECU connector and branch plugs to the injectors and engine sensors. It is used on Volvo EC210B to EC290B excavators (D7D engine). 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.
The same part is also sold as Volvo VOE20718807.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Engine Wiring Harness |
| Replaces | Volvo 20718807 |
| Machine | Volvo EC210B, EC240B, EC290B excavators |
| Engine | Volvo D7D |
| Cross references | Volvo VOE20718807 |
| Fits | Volvo EC210B, EC240B and EC290B excavators with the D7D engine |
| Condition | New, aftermarket |
| Stat. HS-Code | 854430 |
| Country of Manufacture | China |
Volvo machines
Check the part number on your old unit before ordering.
| Volvo Part No.(SPM Part No.) | Fits |
|---|---|
| 20718807(SPM-HEP-5038) | Volvo EC210B, EC240B and EC290B excavators with the D7D engine |
| VOE20718807(SPM-HEP-5038) | Volvo EC210B, EC240B and EC290B excavators with the D7D engine |
Intermittent faults and warning codes
Chafed, crushed or corroded wires in an engine or main harness give faults that come and go: sensor codes, a rough running engine or a machine that will not start. When several sensors fault at once, look at the harness.
Heat and rodent damage
Harnesses next to the exhaust and turbo go brittle and crack, and rodents chew the insulation on machines that stand. A new harness is quicker than repairing many wires.
Burnt or corroded plugs
Green corrosion or melted pins in the plugs cause high resistance and false readings. Replacing the harness renews every plug at once.
Fitting tips
Disconnect the batteries first, photograph or label every plug before removing the old harness, route the new one along the same clips and away from hot and moving parts, then clear the fault codes and test.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| FridayParts | USD 262.49 | 2 Nov 2026 |
| SINOCMP | USD 299.00 | 2 Nov 2026 |
| eBay, aftermarket seller | USD 303.78 | 2 Nov 2026 |
| Spare Part Mart | USD 198.75 | Today |
Our price of USD 198.75 is 24% to 35% 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 Volvo EC210B, and 2 more listed under compatible equipment. Check the old wiring harness is marked 20718807 or one of the cross references, because makers change parts between serial ranges.
On the Volvo EC210B, 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 wiring harness.
Usually. Clear them after fitting and run the machine, so old codes are not mistaken for a new fault.
No. It is an aftermarket wiring harness made to replace the Volvo 20718807. It is not made by the original manufacturer; the number only shows what it replaces.
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