Starter Relay for BOSCH 6033AD5190 6033AD5254 EURO Ⅲ for EFI Special Use JD2943B 1607 24V 100A
A 24V 100A starter relay assembly that cross references BOSCH 6033AD5190, 6033AD5254, SINOTRUK JD2943B, WAI 67-9101, DAF 1686582, 1697625, MAN 51262120016, and is designed for EURO III EFI special use applications in trucks, excavators, engineering vehicles, and buses. It functions as the primary switching device for the starter motor circuit, enabling high-current flow from the battery to the starter solenoid when the ignition switch is activated. The relay is available in zinc-plated or white-plated finish. Factory reference not provided. 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 six OEM part numbers, reducing the need for multiple SKUs in inventory
- 100A rated current capacity supports high-demand diesel engines in heavy-duty vehicles
- 24V system voltage matches commercial vehicle electrical architecture
- Zinc-plated or white-plated finish provides corrosion resistance in harsh environments
- Direct plug-in fit with original connector pattern, no rewiring required at the workshop
- 12 month warranty from B/L date covers failure due to manufacturing defects
Application Scenarios
Where It Is Used
- Fleet maintenance teams replacing failed starter relays on EURO III compliant trucks after repeated cold starts
- Aftermarket distributors stocking relays for excavators and engineering vehicles using the same electrical platform
- Repair shops diagnosing no-crank conditions in MAN and DAF trucks where the original relay has failed
- OEM and ODM suppliers integrating the relay into new vehicle builds with EFI systems
Who It Is For
- Truck parts importers sourcing against BOSCH and SINOTRUK OEM numbers
- Aftermarket distributors serving European and Chinese heavy-duty vehicle fleets
- Fleet workshops maintaining EURO III compliant trucks and buses
- Engineering vehicle repair chains needing reliable starter relays for excavators and special vehicles
Problems It Solves
Symptoms on the Vehicle
- Starter motor that fails to engage due to a failed relay in the high-current switching circuit
- Original BOSCH relays that are difficult to source or expensive through dealer channels
- Relays that corrode or degrade in high-vibration environments due to poor plating
- Multiple part numbers required for different brands (DAF, MAN, SINOTRUK) when one relay covers all
Technical Features
- High-current switching for 100A starter motor circuits in 24V systems
- Designed for EURO III EFI special use applications with precise timing and control
- Zinc-plated or white-plated finish for improved durability and resistance to environmental exposure
- Relay coil operates on 24V system voltage with low control current draw
- Sealed construction suitable for mounting in engine bay or cab relay boxes
Specifications
Only values printed on the original product page are listed. Anything not shown here we confirm in writing before you order.
| OEM No | 6033AD5190, 6033AD5254, SINOTRUK JD2943B, WAI 67-9101, DAF 1686582, 1697625, MAN 51262120016 |
|---|---|
| Reference No | SINOTRUK JD2943B, WAI 67-9101, DAF 1686582, 1697625, MAN 51262120016 |
| Type | Starter relay |
| Voltage | 24V |
| Current Rating | 100A |
| Application | Truck, Excavator, Engineering Vehicle, Bus |
| Emission Standard | EURO III |
| Special Use | EFI special use |
| Color | Zinc-plating / White-plating |
| 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
- Zinc-plated or white-plated steel relay housing
- Copper alloy terminal pins with corrosion-resistant plating
- Moulded thermoplastic base and cover
- Electromagnetic coil with insulated wire
- Spring-loaded contact arm with silver alloy contacts
Quality Control
- 100 percent function test before delivery
- Performance parameters tested 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
Terminal stamping and plating
Coil winding and assembly
PCB and contact assembly
Housing moulding and finishing
Final relay assembly and potting
Electrical function test
Customization Options
- Neutral packing with no brand marking
- Customer branded box with barcode label
- CHINO branded retail box
- OEM and ODM builds against a sample or drawing
Compared With the Alternatives
| BOSCH dealer original relay | Same fitment and electrical performance at lower cost; no dealer part number on neutral packaging unless branded option is selected |
|---|---|
| Used or reclaimed relay | New units carry a 12 month warranty from B/L date; reclaimed stock has no warranty and may have degraded contacts |
Use Guide
- Confirm the vehicle is a 24V system before installation
- Disconnect the battery, remove the failed relay from the relay panel, and install the replacement in the same orientation
- Test the starter circuit by turning the ignition key; ensure the starter motor engages and disengages properly
- If the starter does not engage, check the battery voltage, ignition switch signal, and earth connection before replacing the relay
Also Listed Under
Questions About This Part
Which vehicles does this starter relay fit?
It is designed for trucks, excavators, engineering vehicles, and buses using the BOSCH 6033AD5190, 6033AD5254, SINOTRUK JD2943B, DAF 1686582, MAN 51262120016, and WAI 67-9101 systems. Send your chassis number or vehicle model for confirmation.
What is the minimum order quantity?
10 pcs on catalogue items. We accept small trial orders for testing in your market.
How long is delivery?
7 to 10 working days for stocked fast-moving items. Production orders take longer; we confirm the delivery date in writing upon order placement.
Can I get the parts in my own packaging?
Yes. We offer neutral packing, your branded box with barcode label, or the CHINO branded 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 due to manufacturing defect, we take responsibility. We reply to complaints within 24 hours and propose a solution within 3 days.
Are samples free?
The sample itself is free of charge. We discuss freight cost with you before shipping.
How do you control quality?
Every part is function tested before delivery. Performance parameters are verified in our in-house laboratory. Components come from named suppliers, and production follows the IATF 16949:2016 documented process.
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Ask for a Quote on Starter Relay for BOSCH 6033AD5190 6033AD5254 EURO Ⅲ for EFI
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.