RPM Sensor MK421137 for MITSUBISHI PS-125 12V 4P
A 12V 4-pin RPM sensor that cross references MITSUBISHI PS-125 and OEM MK421137, fitted to MITSUBISHI PS-125 turbocharged engines. It monitors engine speed and sends pulse signals to the ECU for fuel injection timing, tachometer display and diagnostic functions. Supplied in neutral, customised or CHINO branded packaging with a 12 month warranty from B/L date.
MOQ 10 pcs · Free samples, freight at your cost · Neutral or own brand packing · 12 month warranty from B/L date
Key Benefits
- Cross references MITSUBISHI PS-125 and OEM MK421137 for direct fit without modification
- Four pin connector matches the original loom, no rewiring required at the workshop
- 12V operation compatible with standard MITSUBISHI commercial vehicle electrical systems
- Plastic housing with silver finish provides corrosion resistance in engine bay environments
- Ships in 7 to 10 working days as a stocked fast-moving item
- Twelve month warranty from B/L date protects distributor shelf stock and fleet repair inventory
Application Scenarios
Where It Is Used
- Fleet workshops replacing failed RPM sensors on MITSUBISHI PS-125 trucks after engine overhauls
- Aftermarket distributors restocking MITSUBISHI electrical components for Japanese truck fleets
- Repair chains diagnosing tachometer failures or erratic fuel injection timing on MITSUBISHI PS-125 engines
- ODM buyers integrating the sensor into new control modules for MITSUBISHI-compatible systems
Who It Is For
- Truck parts importers who buy against MITSUBISHI OEM numbers
- Aftermarket distributors serving Japanese truck fleets
- Fleet maintenance managers running MITSUBISHI PS-125 trucks and buses
- Auto electrical repair shops that stock sensors by pin count and voltage
Problems It Solves
Symptoms on the Vehicle
- Tachometer that reads zero or jumps erratically due to a failed RPM sensor signal
- Engine that misfires or runs poorly because the ECU receives no speed feedback
- Original sensor that is slow to source and expensive through the dealer network
- Mixed MITSUBISHI fleets that would otherwise need multiple sensor part numbers
Technical Features
- 4-pin connector for signal, ground, power and output pulse transmission
- 12V system voltage compatible with MITSUBISHI PS-125 electrical architecture
- Plastic housing with silver finish suitable for engine bay mounting
- Pulse output signal used by ECU for fuel injection timing and diagnostic monitoring
- Designed to fit the original mounting position on MITSUBISHI PS-125 turbo engines
- Sealed construction to resist oil, dust and moisture in harsh operating conditions
Specifications
Only values printed on the original product page are listed. Anything not shown here we confirm in writing before you order.
| OEM No | MK421137, PS-125 |
|---|---|
| Reference No | MK421137 |
| Type | RPM sensor |
| Voltage | 12V |
| Pin Number | 4P |
| Application | MITSUBISHI PS-125 |
| Place of Origin | Ruian, China |
| MOQ | 10 pcs |
| Delivery Time | 7-10 working days |
| Packing | Neutral, customised or CHINO box |
| Warranty | 12 months since B/L date |
| Certification | ISO 9001:2015 |
Materials and Manufacturing
Materials
- Moulded plastic sensor housing
- Silver-colored finish for corrosion resistance
- Internal coil and magnet assembly for pulse generation
Quality Control
- 100 percent function test before delivery
- Performance parameters checked in the in-house laboratory
- Component materials sourced from named suppliers under the IATF 16949:2016 documented process
- Production and test steps recorded on video
Manufacturing Process
Moulding of plastic sensor housing
Assembly of internal coil and magnetic components
Terminal soldering and wiring
Final sensor calibration and signal testing
Electrical function test and leak test
Customization Options
- Neutral packing with no brand marking
- Customer branded box and barcode label
- CHINO branded retail box
- OEM and ODM builds against a sample or drawing
Compared With the Alternatives
| MITSUBISHI dealer original sensor | Same fitment and pin pattern at aftermarket pricing, but without the dealer part number on the box unless you order branded packaging |
|---|---|
| Used or reclaimed sensors | New units carry a 12 month warranty from B/L date; reclaimed stock carries none |
Use Guide
- Confirm the truck is a 12V system before fitting
- Match the 4-pin connector against the old sensor before ordering
- Isolate the battery, unplug the failed sensor from the engine harness and fit the replacement in the same orientation
- Test tachometer response and engine idle stability before releasing the vehicle
- If the tachometer still fails, check the ECU signal input and sensor ground before condemning the sensor
Also Listed Under
Questions About This Part
Which MITSUBISHI models does MK421137 fit?
It is listed for the MITSUBISHI PS-125. Send us your chassis number and we will confirm against the original sensor before you order.
What is the minimum order quantity?
10 pcs on catalogue items. We also accept small trial orders so you can test the part in your own market first.
How long is delivery?
7 to 10 working days for fast moving items held in stock. Production orders take longer and we confirm the date in writing when the order is placed.
Can I get the parts in my own packaging?
Yes. We supply neutral packing, your own branded box with barcode label, or the CHINO box. Artwork is confirmed before printing.
What warranty do you give?
12 months from the B/L date. If a unit fails within that period we take responsibility when the fault is caused by the part, and we reply to any complaint within 24 hours with a solution within 3 days.
Are samples free?
The sample itself is free of charge. We discuss the freight cost with you before shipping.
How do you control quality?
Every part is function tested before delivery and performance parameters are checked in our own laboratory. Components come from named suppliers and production follows the IATF 16949:2016 documented process.
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Ask for a Quote on RPM Sensor MK421137 for MITSUBISHI PS-125 12V 4P
Send the number printed on your original unit and a photograph of the connector. We confirm the match before you order and send a free sample first.