Mercedes fuel pump relay KPR 0035451205 KR0003 relay KE-Jetronic tested
€99,00
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Mercedes fuel pump relay KPR 0035451205 KR0003 relay KE-Jetronic tested
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Verified purchases via eBay · in-house test bench · Read customer reviews
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KFZTeile-Thot – Genuine used part
Mercedes fuel pump relay KPR 0035451205 KR0003 relay KE-Jetronic tested
The KPR is not a simple switching relay but a small control electronics unit: it primes the fuel pump when the ignition is switched on for approx.
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Condition honestly described
Photos show the actual part
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Genuine part
not aftermarket
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This exact part
Photos show the actual item
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Shipped from Germany
daily shipping on business days
Vehicle system and function
The KPR is not a simple switching relay but a small control electronics unit: it primes the fuel pump for approx. 2 seconds when the ignition is switched on, keeps it active during cranking and while the engine is running, and switches it off for safety when the engine is stopped. Depending on the version, the unit also controls the cold start valve and lambda sensor heating and handles the rev limiting. Typical symptoms of a faulty KPR: engine does not start (pump does not run), sporadic stalling, misfires.
Installation location: In the control unit/electronics box in the engine compartment (water box), next to the injection control units.
Condition: Used genuine part, personally tested by me, works. Housing with light scratches on the ribbed top and a small paint spot on one edge, plug contacts with slight age-related tarnish, all pins present and straight. No breaks or cracks.
Fits the following Mercedes models
| Model series | Models |
| W124 family, KE-Jetronic era (manual transmission, 1980s) | Please compare the part number with your old part – the relay only fits reliably if the number is identical |
Important distinction – please check before buying
⚠ The number 003 545 12 05 is decisive for compatibility
The number is no longer listed in the usual catalog lists. Repairer documentation assigns it to the W124 family of the KE-Jetronic era (version for manual transmission, 1980s model series). Before buying, you must compare the part number on your old part – the relay only fits reliably if the number is identical. We are happy to answer questions about the connector pinout.
⚠ Does not fit:
- KPR numbers 003 545 13 05, 003 545 19 05, 003 545 20 05, 002 545 21 05 (M102 group)
- KPR numbers 003 545 24 05, 002 545 92 05 (M103 group)
- Mercedes fitted different KPR versions depending on engine/transmission – always match by part number
Not sure which version your vehicle has? Just send us your VIN before buying and we will check it for you free of charge.
FAQ
Will this part definitely fit my vehicle?
Send us your VIN before you buy. We will check it against the parts catalog and tell you with certainty whether this part fits.
Do I get exactly the part shown in the photos?
Yes. The photos show the actual part you will receive.
Do I need to send in my old part?
No. No core deposit is charged and you don't need to return anything.
Scope of delivery
Scope of delivery: see product photos.
Any questions?
If you have any questions or need additional information, we are always happy to help by message or phone. If you are dissatisfied with the item described, send us a message. If you are ever not satisfied with the item you bought, please contact us before leaving a neutral or negative review. We will surely find a solution together.Does this part fit your car? Send us your VIN and model year – we will check it free of charge: contact form or thot.kfzteile@gmail.com.
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