The Bomag 05742121 Water Temperature Sensor is a genuine OEM component designed for a wide range of Bomag tandem rollers, single drum rollers, pneumatic tyred rollers, and pavers. Sourced directly from Bomag, this sensor delivers the exact fit and electrical specification required to keep engine temperature monitoring accurate across compatible machines. Confirmed fitment includes BW 100 AD-5, BW 120 AD-5, BW 141 AD-5, BW 145 D-5, BW 177 DH-5, BW 190 AD-5, BW 202 AD-5, BW 11 RH-5, and BF 300 P-2 S340-2 TV pavers, among others. When a worn or failed sensor is replaced with part number 05742121, operators restore accurate coolant temperature readings and protect the engine from undetected overheating.
Key Features
- OEM-Matched Signal Output — calibrated to the exact resistance and output range specified by Bomag, ensuring the instrument panel reads coolant temperature accurately without recalibration
- Direct Drop-In Replacement — matches the thread pitch, connector type, and housing dimensions of the original sensor for a straightforward swap with standard hand tools
- Broad Bomag Fitment — compatible with BW-series tandem rollers (including BW 100 through BW 202 variants), BW single drum rollers, the BW 11 RH-5 pneumatic tyred roller, and BF 300-series pavers
- Engine Protection Restored — a functioning water temperature sensor gives operators and onboard systems the real-time data needed to prevent heat-related engine damage; a faulty sensor can mask dangerous overheating conditions
- Genuine Bomag OEM Part — manufactured to Bomag's original design specifications, ensuring long service life and compatibility with the machine's ECU and warning systems
The water temperature sensor monitors coolant temperature in the engine and transmits a continuous signal to the machine's instrument cluster and control system. This data allows operators to identify overheating conditions before they cause engine damage, and it enables automatic protection systems to respond when temperatures exceed safe limits. When the sensor fails or drifts out of calibration, temperature readings become unreliable or disappear entirely — leaving the engine vulnerable to heat damage that can result in costly repairs or unplanned downtime.
Part Details
| Part Number | 05742121 |
|---|---|
| Brand | Bomag |
| Part Type | Genuine OEM |
| Description | Water Temperature Sensor |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Paver | BF 300 C-2 S340-2 TV | 00800809, 00825649 |
| Paver | BF 300 P-2 S340-2 TV | 00800811, 00825651 |
| Paver | BF 300 P-2 S340-2 V | 00800815 |
| Tandem Roller | BW 141 AD-5 | 00824049, 00825593 |
| Tandem Roller | BW 151 AD-5 | 00824051, 00825595 |
| Tandem Roller | BW 154 AD-5 | 00824053, 00825597 |
| Tandem Roller | BW 151 AD-5 AM | 00824055 |
| Tandem Roller | BW 151 AC-5 | 00824057 |
| Tandem Roller | BW 174 AP-4i AM | 00824093, 00824627, 00825051 |
| Tandem Roller | BW 174 AP-4i | 00824095, 00824629, 00825053 |
| Tandem Roller | BW 161 AD-5 | 00824103, 00824647 |
| Tandem Roller | BW 161 AC-5 | 00824109, 00824655 |
| Tandem Roller | BW 161 ADO-5 | 00824359, 00824657 |
| Tandem Roller | BW 190 AD-5 | 00824361, 00824651 |
| Tandem Roller | BW 190 ADO-5 | 00824363, 00824661 |
| Tandem Roller | BW 154 AP-4i AM | 00824385 |
| Single Drum Roller | BW 145 DH-5 | 00824471, 00825721 |
| Single Drum Roller | BW 145 PDH-5 | 00824473, 00825723 |
| Single Drum Roller | BW 177 DH-5 | 00824475, 00825435, 00825727 |
| Single Drum Roller | BW 177 PDH-5 | 00824477, 00825437, 00825729 |
| Single Drum Roller | BW 177BVC-5 | 00824479 |
| Tandem Roller | BW 154 AP-4i | 00824587 |
| Tandem Roller | BW 154 ACP-4i AM | 00824589, 00825383 |
| Tandem Roller | BW 120 AD-5 | 00824615, 00825567 |
| Tandem Roller | BW 100 AD-5 | 00824617, 00825373, 00825565 |
| Tandem Roller | BW 120 AC-5 | 00824619, 00825571 |
| Tandem Roller | BW 100 AC-5 | 00824621, 00825569 |
| Tandem Roller | BW 202 AD-5 | 00824649 |
| Pneumatic Tyred Roller | BW 11 RH-5 | 00824749, 00824939, 00824993, 00825667 |
| Single Drum Roller | BW 177 D-5 | 00824913, 00825433, 00825725 |
| Tandem Roller | BW 138 AD-5 | 00824921, 00825559 |
| Tandem Roller | BW 138 AC-5 | 00824923, 00825561 |
| Single Drum Roller | BW 145 D-5 | 00825003, 00825427 |
| Single Drum Roller | BW 124 PDH-5 | 00825071, 00825075, 00825625, 00825735 |
| Single Drum Roller | BW 124 DH-5 | 00825073, 00825193, 00825623, 00825733 |
| Tandem Roller | BW 174 APO-4i | 00825099 |
| Tandem Roller | BW 174 ACP 4I AM | 00825103 |
| Tandem Roller | BW 135 AD-5 | 00825563 |
| Paver | BF 300 C-2 S340-2 V | 00825653 |
| Single Drum Roller | BW 177-5 | 00825731 |
| Paver | BF200C 2 | 00825873 |
| Single Drum Roller | BW 145 D-5 PL | 00827061 |
| Single Drum Roller | BW 177 DH-5 PL | 00827077, 00827377 |
| Single Drum Roller | BW 177 D-5 PL | 00827081, 00827375 |
| Tandem Roller | BW141AD 5 | 00827405 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
