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Caterpillar 161-1704 is the engine oil pressure sensor with a brass body, female hex port, O ring and a black three pin connector. It is used on Caterpillar 329D and 330D 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.
The same part is also sold as Caterpillar 210-1747.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Oil Pressure Sensor |
| Replaces | Caterpillar 161-1704 |
| Machine | Caterpillar 328D LCR, 329D LN, 330D MH, 336D |
| Pins | 3 |
| Cross references | Caterpillar 210-1747 |
| Fits | Caterpillar 328D LCR, 329D LN, 330D MH and 336D excavators with C7 and C9 engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 903289 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 161-1704(SPM-HEP-4716) | Caterpillar 328D LCR, 329D LN, 330D MH and 336D excavators with C7 and C9 engines |
| 210-1747(SPM-HEP-4716) | Caterpillar 328D LCR, 329D LN, 330D MH and 336D excavators with C7 and C9 engines |
Wrong or missing reading
A failed sensor gives a dead or false gauge reading or a warning light.
Fault codes
Check the wiring and plug first; if the sensor itself reads out of range, replace it.
Corrosion
Connectors on machines take water and dirt. A corroded sensor is cheaper to replace than to chase.
Fleet spares
Common sensors are worth keeping in stock for each machine type.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay, aftermarket seller | USD 19.51 | 31 Oct 2026 |
| Reliable Aftermarket Parts | USD 59.43 | 31 Oct 2026 |
| SINOCMP | USD 62.00 | 31 Oct 2026 |
| Fab Heavy | USD 76.76 | 31 Oct 2026 |
| KuduParts | USD 86.00 | 31 Oct 2026 |
| Spare Part Mart | USD 16.25 | Today |
Our price of USD 16.25 is 17% to 81% 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 Caterpillar 328D LCR, and 4 more listed under compatible equipment. Check the old sensor is marked 161-1704 or one of the cross references, because makers change parts between serial ranges.
On the Caterpillar 328D LCR, 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.
Yes. Many machines have 12 V and 24 V versions of the same sensor. Check the old part or the machine plate before fitting.
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 sensor.
No. It is an aftermarket sensor made to replace the Caterpillar 161-1704. 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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