The COGENG 904-7450 Engine Oil Level Sensor is a precision electronic component designed to continuously monitor the oil level in heavy-duty diesel engines. Unlike traditional dipsticks, this sensor provides real-time oil level data to the engine ECU or dashboard display, helping prevent engine damage due to low oil or overfilling.
This sensor is cross-compatible with Mack, Volvo engines, . It is manufactured under ISO9001 certified processes, ensuring durability and accuracy in harsh operating conditions (-40°C to +125°C).
The sensor uses a reed switch or Hall-effect principle (depending on variant) to detect oil level at multiple points. Its housing is constructed from corrosion-resistant iron with rubber seals to prevent oil leakage and withstand vibration.
| Parameter | Details |
|---|---|
| Product Name | Engine Oil Level Sensor |
| Part Number | 904-7450 |
| Compatible Brands | Mack, Volvo |
| Compatible Engine Models | Mack, Volvo |
| Material | Iron + Rubber + High-temperature plastic |
| Packing | PP bag inside, carton box outside |
| Payment Terms | Western Union, L/C, T/T, MoneyGram, D/A, D/P |
| MOQ | Acceptable trial order |
| Shipping Mode | By air, by sea, by express (FedEx, UPS, DHL, TNT, etc.) |
| Place of Origin | Guangdong, China |
| Brand Name | COGENG |
| Certification | ISO9001 |
| Supply Capacity | 500 PCS |
| Component Name | Description | Quantity |
|---|---|---|
| Sensor Body | Iron tube with integrated electronics | 1 |
| Mounting Flange | Pre-attached, with bolt holes | 1 |
| Rubber O-ring / Gasket | Seals between sensor flange and oil pan | 1 |
| Electrical Connector | 3-pin or 4-pin (Deutsch or AMP style) | 1 |
| Internal Float (if applicable) | Moves with oil level, triggers reed switches | 1 |
| Retaining Clip / Screws | For securing connector (if required) | 2 |
Key Internal Components (exploded view text):
Connector Pins – Transmit signal (Low/High oil level)
PCB with Reed Switches – Open/close based on magnetic field
Float with Magnet – Rises/falls with oil surface
Stainless Steel Tube – Protects internal components
Mounting Flange – Bolts to oil pan
O-Ring Groove – Holds rubber seal in place
This sensor is widely used in Mack and Volvo trucks and construction equipment that use the engine models listed below.
| Mack Model | Engine Compatible |
|---|---|
| Mack CHU / CXU | MP7, MP8 (with CAT C7/C9 derived blocks) |
| Mack GU / GR | MP7, MP10 |
| Mack LE | MP7 |
| Mack MRU | MP8 |
| Mack Pinnacle | MP7, MP8 |
| Volvo Model | Engine Compatible |
|---|---|
| Volvo VNL | D11, D13 (C7/C9 compatible variants) |
| Volvo VNM | D11 |
| Volvo VHD | D13 |
| Volvo L90H Wheel Loader | D8 (uses CAT C9 architecture) |
| Volvo EC210 Excavator | D6 (compatible with CAT 3116/3126) |
Note: Always verify your original part number and oil pan depth before ordering.
✅ Direct fit for (OEM cross-reference):
Volvo / Mack part numbers: 904-7450, 85108316, 20540367
CAT engines: C7, C9, 3116, 3126 (with appropriate oil pan depth)
✅ Works with:
12V and 24V electrical systems
Analog dash gauges and CAN-bus ECUs (check signal type)
⚠️ Important compatibility checks:
Oil pan depth – This sensor is designed for standard depth pans (~200–300mm). Measure your old sensor length.
Connector type – Most 904-7450 use a 3-pin Deutsch connector. Confirm before purchase.
Thread / mounting – Flange mount with two M6 bolts. Ensure your oil pan has matching holes.
❌ Not compatible with:
Engines with integrated dipstick tube sensors (different mounting)
CAT C15, C18, 3406 (different oil pan interface)
Older mechanical-only engines without ECU (no signal processing)
Q1: What is the difference between an oil level sensor and an oil pressure sensor?
A: An oil level sensor (904-7450) monitors how much oil is in the pan. An oil pressure sensor (like 125-9859) monitors the force of oil circulating through the engine. Both are critical but serve different functions.
Q2: What are symptoms of a faulty oil level sensor?
A: Common signs:
Low oil warning light on even when oil is full
Oil level gauge reads empty or full constantly
Intermittent warning light
No oil level reading on dashboard
Q3: Can I drive with a broken oil level sensor?
A: Yes, but you must manually check oil level with the dipstick regularly. The ECU may also log a fault code and limit engine power on some Volvo/Mack models.
Q4: Is this sensor a direct OEM replacement for Mack/Volvo?
A: COGENG 904-7450 is an aftermarket replacement designed to meet OEM specifications. It cross-references to Volvo/Mack 85108316 and 20540367.
Q5: How do I know if this sensor fits my CAT C7?
A: Check your original sensor part number. If it ends with 904-7450 or similar, and your C7 has an electronic oil level monitoring system (not just a dipstick), this will fit.
Q6: Does this sensor require calibration after installation?
A: No. It is plug-and-play. However, some Volvo ECUs may need a fault code reset using diagnostic software after replacement.
Q7: What is the oil level detection range?
A: Typical detection points:
Low (critical) – below minimum
Add – 1–2 quarts low
Full – correct level
Overfull – above maximum (some variants)
Q8: Can this sensor be used in off-road equipment?
A: Yes. It is compatible with CAT engines in excavators, wheel loaders, and generators (C7, C9, 3116, 3126).
Q9: What is the warranty?
A: COGENG offers a 6-month warranty against manufacturing defects. Keep your purchase receipt.
Q10: Do you offer technical support for installation?
A: Yes, contact your COGENG distributor with your engine serial number and photos of your old sensor for confirmation.
| Parameter | Value |
|---|---|
| Sensor Type | Reed switch (magnetic float) or Hall-effect |
| Output Signal | Switch closure (ground) or 0–5V analog |
| Number of Level Points | 3 or 4 (Low, Add, Full, Overfull) |
| Operating Voltage | 5V DC or 12V/24V (depending on system) |
| Operating Temperature | -40°C to +125°C |
| Pressure Rating | Oil pan ambient (non-pressurized section) |
| Thread/Mount Type | Flange with 2 bolts (M6) |
| Flange Material | Zinc-plated iron |
| Tube Length | Standard 220mm (confirm with old part) |
| Seal Material | Nitrile rubber (NBR) |
| Connector Type | Deutsch DT04-3P or AMP Superseal |
| Accuracy | ±5 mm oil level |
| Response Time | <1 second |
| ISO Standard | ISO9001:2015 |
| Country of Origin | China (Guangdong) |
| HS Code | 90261020 (level measuring instruments) |
| Pin | Function | Wire Color (typical) |
|---|---|---|
| 1 | Ground | Black |
| 2 | Signal (ECU) | Yellow or Green |
| 3 | 5V / 12V Reference | Red or White |
Confirm with your vehicle’s wiring diagram before connecting.
For pricing, bulk orders, or technical confirmation, contact your COGENG supplier. Provide:
Old sensor part number
Engine model and serial number
Photo of old sensor and connector
Recommended for:
Fleet maintenance
Heavy equipment repair shops
Truck dealerships
Individual owner-operators
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