No Products in the Cart
Caterpillar 161-9926 is the engine pressure sensor: a brass body with a female threaded port and a round three pin plug. It is used on Caterpillar 3406E and 3412 engines. 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 | Pressure Sensor |
| Replaces | Caterpillar 161-9926 |
| Connector | 3 pin, round |
| Body | Brass, female thread |
| Fits | Caterpillar 3406E, 3412, 3412C, 3456, 3508, 3512 and 3516 engines, as fitted to 834B, 844 and 854G wheel dozers and 329, 330, 336 and 345D excavators |
| 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 |
|---|---|
| 161-9926(SPM-HEP-4631) | Caterpillar 3406E, 3412, 3412C, 3456, 3508, 3512 and 3516 engines, as fitted to 834B, 844 and 854G wheel dozers and 329, 330, 336 and 345D excavators |
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 (8 aftermarket sellers) | USD 30.00 to 43.66 | 31 Oct 2026 |
| FridayParts | USD 54.60 | 31 Oct 2026 |
| AllProDiesel (PAI) | USD 79.38 | 31 Oct 2026 |
| HeavyDutyKits (PAI) | USD 88.90 | 31 Oct 2026 |
| Spare Part Mart | USD 24.00 | Today |
Our price of USD 24.00 is 20% to 73% 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 3406E, and 13 more listed under compatible equipment. Check the old sensor is marked 161-9926 or one of the cross references, because makers change parts between serial ranges.
On the Caterpillar 3406E, 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.
A little dielectric grease keeps water out of the plug on machines that work outside. Make sure the terminals are clean and tight first.
Yes. Many machines have 12 V and 24 V versions of the same sensor. Check the old part or the machine plate before fitting.
No. It is an aftermarket sensor made to replace the Caterpillar 161-9926. 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.
Join and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that. Turn points into a discount whenever you like.
Opens the Marty Mates panel. No password: you enter your email, we send a code, and that is you in with your 200 points waiting. Joining signs you up to our emails and you can leave any time from the link in any of them. See our terms and conditions.
Member deals, specials before they go public, and easy ways to stack up points. Plus a nudge when a part you bought is due, so you are not caught out mid job.
You can leave any time from the link in any email we send. See our terms and conditions.
We will only bother you when it is worth it: a member deal, a specials drop, a way to earn points faster, or a heads up that a part you bought is due.
Join Marty Mates and we put 200 points on your account, worth $10 off an order over $75 USD. Then a point for every dollar you spend after that.
No password: you enter your email, we send a code, and that is you in.
