1. ECUs & Computer Modules Deals
  2. sku: 15976026007749603
  3. BOSCH MERCEDES

BOSCH / MERCEDES Mas Fuel Pump Relay 05-3700-45

fits model: W124, 300te, W126, 300sel, Se. year: 1990–1991.

Bosch / Mercedes 05 3700 45 90-92 W124 300te E 90-91 W126 300sel Se Mas Fuel Pump Oem 1 Relay

( Brand: Bosch / Mercedes ), ( Protection Lock: No ), ( Input Connection: Analog Input ), ( Memory: Flash ), ( Items Included: As Pictured ), ( Output Connection: Factory ), ( Item Length: 8 Inch ), ( Placement On Vehicle: Front ), ( Copyright: Mb-vintage-world Only No Other ), ( Manufacturer Warranty: 1 Month ), ( Connector Type: Female ), ( Features: Easy Installation ), ( Mounting Style: Clip-on ), ( Maximum Amperage: Other ), ( Terminal Type: Pin ), ( Material: Aluminum, Plastic, Steel ), ( Vintage Part: Yes ), ( Type: Relay ), ( Ipn: 05 3700 45 ), ( C.a.r.b. Eo : W124, W201, W126 1990-1992 Mas Oem 1 Relay, Fuel Pump M103, 01154579 ), ( Oe/oem Part Number: Oem ), ( Country Of Origin: Germany ), ( Item Weight: 2p )

Review BOSCH / MERCEDES 05 3700 45 Mas Fuel Pump Oem Relay fits W124 300TE W126 300SEL SE 1990–1991

The Bosch Mercedes-Benz 05 3700 45 90-92 Fuel Pump Relay is an essential component for the fuel delivery system in certain Mercedes-Benz models, including the W124 300TE and W126 300SEL SE. This high-quality, OE-style relay is designed to ensure reliable and efficient operation of the fuel pump.

This fuel pump relay is engineered to meet the stringent requirements of Mercedes-Benz vehicles. It features a robust housing that protects the internal components from environmental factors, ensuring a long service life. The relay contacts are made of high-quality materials, ensuring a secure and reliable connection.

The Bosch Mercedes-Benz 05 3700 45 90-92 Fuel Pump Relay is designed to switch the fuel pump on and off based on the engine's requirements. When the engine is started, the relay sends power to the fuel pump, allowing it to deliver fuel to the engine. Once the engine reaches operating temperature, the relay turns off the fuel pump to conserve fuel and reduce unnecessary wear.

This fuel pump relay is easy to install and comes with all necessary mounting hardware. It is a direct replacement for the original equipment, ensuring a perfect fit and function. The relay is also backed by Bosch's warranty, giving you peace of mind and protection against manufacturing defects.

In summary, the Bosch Mercedes-Benz 05 3700 45 90-92 Fuel Pump Relay is a high-quality, OE-style component designed to ensure reliable and efficient fuel delivery in select Mercedes-Benz models. It features a robust housing, reliable contacts, and is easy to install. With its direct replacement design and Bosch warranty, this fuel pump relay is the perfect choice for Mercedes-Benz owners looking to maintain the performance and reliability of their vehicles.

The Bosch Mercedes-Benz 05 3700 45 90-92 fuel pump relay is a crucial component for the fuel system in certain Mercedes-Benz models, including the W124 300TE and W126 300SEL/SE. Let's discuss the potential advantages and disadvantages of purchasing this part.

Pros:

1. OEM (Original Equipment Manufacturer) part: This relay is made by Bosch, the original equipment supplier for Mercedes-Benz. Using an OEM part can ensure proper fit, function, and compatibility with other components in the vehicle.

2. Reliable: Bosch is a reputable brand known for producing high-quality automotive parts. A new fuel pump relay can help prevent fuel delivery issues and improve the overall performance of the vehicle.

3. Long-lasting: Although the fuel pump relay may not be the most frequently replaced part, it is essential to have a reliable one. A new OEM relay can provide peace of mind and minimize the likelihood of future fuel system problems.

Cons:

1. Cost: OEM parts, especially those from well-known brands like Bosch, can be more expensive than aftermarket alternatives. The price difference may be significant, but the potential benefits in terms of reliability and compatibility might outweigh the added cost for some consumers.

2. Availability: Depending on the specific Mercedes-Benz model and the availability of the part at local dealerships or parts stores, it might take some time to source and receive the Bosch fuel pump relay.

In conclusion, purchasing the Bosch Mercedes-Benz 05 3700 45 90-92 fuel pump relay can offer several advantages, such as ensuring proper fit, function, and reliability. However, the higher cost compared to aftermarket alternatives and potential availability issues should be taken into consideration. Ultimately, the decision to buy this part depends on an individual's priorities, budget, and the importance of having a genuine OEM component in their vehicle. If reliability and compatibility are top priorities, the investment in a Bosch fuel pump relay could be worthwhile.

Details:

Shipping cost or carrier may change, based on final destination. Genuine part: Yes genuine Factory. What you getting: Comes as 1 Relay per sale. It could be taken out or put in by turning the black knob from one side to other.

Most of the parts are tested either before or after removal from vehicle. This is not a silver bullet solution. Item may show light scuffs, scratches or other imperfections as a result of this being used part. Comes as 1 Relay per sale only.

This part can be found on the right far side under hood behind a plastic cover. You are looking at a Mercedes 1990 1992 W126 300SE ,W124 300E only under hood Mas Genuine OEM used 1 Relay. Notes: imperfections, wear, age and light scratches as Seen in the photos. Brand: Mercedes-Benz.

Condition: used. Make sure by testing the system not connecting parts that this is part needs replacing a different before purchasing, there are many other parts could be causing problem in these cars 5 or 6 area's, Transmission Neutral switch/ Computer ECU /computer over load protection/fuel injection Sensor/fuel pump/wiring harness, AC compressor/ pressure switches, overload protection. Please, do not purchase parts just to check and diagnose your vehicles problem.

specifications ecusrush:

  • for models: W124, 300te, W126, 300sel, Se
  • for years: 1990-1991
  • brand: Bosch / Mercedes
  • protection lock: No
  • input connection: Analog Input
  • memory: Flash
  • items included: As Pictured
  • output connection: Factory
  • item length: 8 Inch
  • placement on vehicle: Front
  • copyright: Mb-vintage-world Only No Other
  • manufacturer warranty: 1 Month
  • connector type: Female
  • features: Easy Installation
  • mounting style: Clip-on
  • maximum amperage: Other
  • terminal type: Pin
  • material: Aluminum, Plastic, Steel
  • vintage part: Yes
  • type: Relay
  • interchange part number: 05 3700 45
  • c.a.r.b. eo : W124, W201, W126 1990-1992 Mas Oem 1 Relay, Fuel Pump M103, 01154579
  • oe/oem part number: Oem
  • country of origin: Germany
  • item weight: 2p

shipping ecusrush:

  • type: Fixed
  • cost: $12.00
  • transit: 3-9 Days
  • class: Standard, Expedited
  • carrier: USPS
  • service: USPS Ground Advantage, USPS Priority Mail

returns ecusrush:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Buyer

offer ecusrush:

  • availability: In Stock
  • sold: 0
  • started: May 18, 2026
  • options: Ship-to-home
  • quantity: 10

payments ecusrush:

  • wallet: Paypal
  • credit card: Mastercard
  • other

seller ecusrush:

  • city: Rocklin, California
  • rating: 100.0%
  • # reviews: 6429

general ecusrush:

  • Car Truck Parts Accessories > Starters, Alternators, ECUs Wiring > ECUs Computer Modules
  • condition: Used
for models: w124, 300te, w126, 300sel, se, for years: 1990-1991, protection lock: no, input connection: analog input, memory: flash, items included: as pictured, output connection: factory, item length: 8 inch, placement on vehicle: front, copyright: mb-vintage-world only no other, manufacturer warranty: 1 month, connector type: female, features: easy installation, mounting style: clip-on, maximum amperage: other, terminal type: pin, vintage part: yes, type: relay, c.a.r.b. eo: w124, w201, w126 1990-1992 mas oem 1 relay, fuel pump m103, 01154579, oe/oem part number: oem, country of origin: germany, item weight: 2p,
category: auto parts > car truck parts accessories > starters, alternators, ecus wiring > ecus computer modules, material: aluminum, plastic, steel, sku: 15976026007749603,

Bosch / Mercedes Is Similar To:

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1 offer $50.00 USD
  • Used. Offer #1 priced at $50.00 + $5.89 delivery = $55.89* total. This relay is designed for easy installation with a screw-in mounting style and has a maximum amperage of factory specifications The Mercedes W124, W201, and W126 1986-1992 Mas 1 Relay is a vintage part made of aluminum, plastic, and steel.+$5.89 shipping

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