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Details
| Specification | Value |
|---|---|
| Brand | INTERMOTOR |
| Thread Size | N/A |
| Operating Mode | MF |
| Spanner Size | N/A |
| Number of pins | 4 -pin connector |
| Technical Information Number | Circuit N.O./N.C. |
| Net weight [kg] | 0,036 kg |
OE/OEM numbers (7)
Search by this OE number to find compatible parts
- AUDI / SEAT / VAG—1K2 945 511
- SKODA / VW—1K2 945 511 RDW
- AUDI / SEAT / VAG—3B0 945 511
- SKODA / VAG / VW—3B0 945 511A
- AUDI / SEAT / SKODA—3B0 945 511B
- AUDI / SEAT / SKODA / VW—3B0 945 511D
- SEAT / VAG / VW—7L6 945 511
Where this part fits
Original-fit position for OE 3B0945511A. The red ring marks where this part installs on the vehicle.
About this product
The INTERMOTOR Stop Light Switch (51621) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Thread Size: N/A, Operating Mode: MF, Spanner Size: N/A, Number of pins: Copper -pin connector, Housing Colour: Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit AUDI, SEAT, SKODA, VW models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 1.810.229, 1K2 945 511, 1K2 945 511 RDW, 24761 and 21 more. Matching these numbers confirms a like-for-like replacement with no loss of function. INTERMOTOR 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.
Suitable cars
Equivalent products (18)
Stop Light Switch INTERMOTOR 51621 — compatible car models
| Car models | AUDI: A3 (8P1), A3 Convertible (8P7), A3 Sportback (8PA), A4 B5 (8D2), A4 B5 Avant (8D5), A4 B6 (8E2), A4 B6 Avant (8E5), A4 B6 Convertible (8H7), A4 B7 (8EC), A4 B7 Avant (8ED) (+12 more); SEAT: ALTEA (5P1), ALTEA XL (5P5, 5P8), AROSA (6H1), EXEO (3R2), EXEO ST (3R5), LEON (1P1), TOLEDO III (5P2); SKODA: OCTAVIA II (1Z3) |
|---|---|
| Engines | 1.6; 1.9 TDI; 1.8 T; 2.0 TDI; 2.7 TDI quattro; 2.8 FSI; 2.5 TDI quattro; 3.0 TDI quattro; 4.2 FSI quattro; 1.0; 1.2 TSI; 1.4 16V; 1.4 |
| Year of manufacture | 1994-2017 |
| Manufacturer article number (MPN) | 51621 |
| OE part numbers | 1K2 945 511, 1K2 945 511 RDW, 3B0 945 511, 3B0 945 511A, 3B0 945 511B, 3B0 945 511D, 7L6 945 511 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
INTERMOTOR 51621 . Connector Shape: 1. Housing Colour: 1. Net weight [kg]: 0,036 kg. Number of pins: 4 -pin connector. Operating Mode: MF. Spanner Size: N/A. Technical Information Number: Circuit N.O./N.C.. Thread Size: N/A
- 1x Stop Light Switch
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 Stop Light Switch compatible with my car?
This Stop Light Switch fits AUDI, SEAT, SKODA, VW 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 INTERMOTOR Stop Light Switch have?
This INTERMOTOR Stop Light Switch has the following specifications: Thread Size: N/A; Operating Mode: MF; Spanner Size: N/A; Number of pins: 4 -pin connector; Housing Colour: 1; Connector Shape: 1. Check the full specifications table above for complete details.
What OE part numbers does this Stop Light Switch replace?
This Stop Light Switch replaces OE part numbers: 1K2 945 511, 1K2 945 511 RDW, 3B0 945 511, 3B0 945 511A, 3B0 945 511B, 3B0 945 511D, 7L6 945 511. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Stop Light Switch cost?
Stop Light Switch prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this INTERMOTOR Stop Light Switch. All parts come with our 14-day money-back guarantee.
How do I know when to replace my Stop Light Switch?
Regular inspection of your Stop Light Switch is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Stop Light Switch?
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 Stop Light Switch fitted by a professional mechanic.
Can I use this part as a replacement for OE 1K2 945 511?
Yes, this INTERMOTOR Stop Light Switch is a direct replacement for OE part number 1K2 945 511. 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.
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