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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Number of pins | 2 -pin connector |
OE/OEM numbers (6)
Search by this OE number to find compatible parts
- MERCEDES-BENZ—646 074 03 84
- MERCEDES-BENZ—646 074 04 84
- MERCEDES-BENZ—651 074 00 84
- MERCEDES-BENZ—A646 074 03 84
- MERCEDES-BENZ—A646 074 04 84
- MERCEDES-BENZ—A651 074 00 84
Where this part fits
Original-fit position for OE 6460740484. The red ring marks where this part installs on the vehicle.
About this product
TOPRAN Fuel Pressure Regulator (409 766) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Number of pins: Aluminium -pin connector, Housing Colour: EPDM, Connector Shape: Aluminium — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with MERCEDES-BENZ vehicles; use the vehicle selector above to confirm exact fitment for your make, model, and engine variant. Fitment data is sourced from TecDoc, the authoritative European parts catalogue. This part supersedes original equipment references: 001-10-22943, 001-10-25636, 02.13.243, 096.5737 and 42 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Fuel Pressure Regulator buying guide
Why replace this part?
The fuel pressure regulator maintains correct fuel rail pressure for the injectors. A faulty regulator causes either high pressure (rich running, black smoke, fouled plugs) or low pressure (lean misfires, hesitation, hard starting).
Signs you need a replacement
- Black exhaust smoke and strong fuel smell indicating over-fuelling
- hard starting and misfires indicating under-fuelling
- fuel consumption increase
- check engine light
- fuel in the vacuum hose to the regulator
When to replace
No fixed interval — replace on failure or when fuel pressure testing identifies deviation from specification.
About TOPRAN
TOPRAN, part of the Hans Thomsen Group headquartered in Hamburg, Germany, is a growing independent aftermarket brand focused on providing quality parts at accessible prices. TOPRAN offers a comprehensive range covering engine, cooling, electrical, braking, and body components for European vehicles. All TOPRAN products are manufactured to meet OE specifications and undergo quality testing before distribution. Combining German quality management with competitive pricing, TOPRAN is an excellent choice for cost-conscious motorists and workshops who do not want to compromise on part quality.
Suitable cars
Equivalent products (45)
Show all 45 OE numbers
Fuel Pressure Regulator TOPRAN 409 766 — compatible car models
| Car models | MERCEDES-BENZ: A-CLASS (W176), B-CLASS Sports Tourer (W246, W242), C-CLASS Coupe (C205), C-CLASS T-Model (S204), C-CLASS T-Model (S205), C-CLASS (W204), C-CLASS (W205), CLA Coupe (C117), CLA Shooting Brake (X117), CLS (C218) (+20 more) |
|---|---|
| Engines | A 180 CDI (176.000); B 180 CDI (246.200); C 220 d (205.304); C 180 CDI (204.200); C 200 d (205.207); C 180 CDI (204.000); C 200 d (205.007); CLA 200 CDI (117.301); CLA 200 CDI / d (117.908); CLS 220 BlueTEC / d (218.301); CLS 220 BlueTEC / d (218.901); E 220 BlueTEC (207.401); E 220 BlueTEC (207.301); E 200 CDI / BlueTEC (212.205, 212.206); E 200 CDI / BlueTEC (212.005, 212.006) (+15 more) |
| Year of manufacture | 2005-2023 |
| Manufacturer article number (MPN) | 409 766 |
| OE part numbers | 646 074 03 84, 646 074 04 84, 651 074 00 84, A646 074 03 84, A646 074 04 84, A651 074 00 84 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 409766 . Connector Shape: 2. Housing Colour: 15. Number of pins: 2 -pin connector
- 1x Fuel Pressure Regulator
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Fuel Pressure Regulator compatible with my car?
This Fuel Pressure Regulator fits MERCEDES-BENZ vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this TOPRAN Fuel Pressure Regulator have?
This TOPRAN Fuel Pressure Regulator has the following specifications: Number of pins: 2 -pin connector; Housing Colour: 15; Connector Shape: 2. Check the full specifications table above for complete details.
What OE part numbers does this Fuel Pressure Regulator replace?
This Fuel Pressure Regulator replaces OE part numbers: 646 074 03 84, 646 074 04 84, 651 074 00 84, A646 074 03 84, A646 074 04 84, A651 074 00 84. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Fuel Pressure Regulator cost?
This TOPRAN Fuel Pressure Regulator is available for £100.99. Fuel Pressure Regulator prices vary depending on brand, specifications, and vehicle compatibility. TOPRAN parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Fuel Pressure Regulator?
Look for black exhaust smoke (over-fuelling), fuel smell in the oil, hard starting, engine stalling, flooded spark plugs, or a fuel pressure reading outside the specified range when tested.
What tools do I need to replace a Fuel Pressure Regulator?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Fuel Pressure Regulator fitted by a professional mechanic.
Can I use this part as a replacement for OE 646 074 03 84?
Yes, this TOPRAN Fuel Pressure Regulator is a direct replacement for OE part number 646 074 03 84. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
