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Details
| Specification | Value |
|---|---|
| Brand | FAST |
| MPN | ft00046 |
| Voltage [V] | 12 V |
| Fitting Position | Left Rear |
| Operating Mode | EL |
| paired article number | FT00047 |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- AUDI / VW—4F0839015
- VW / AUDI / SEAT—8E0 839 015AA
Where this part fits
Original-fit position for OE 4F0839015. The red ring marks where this part installs on the vehicle.
About this product
FAST Door Lock (FT00046) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Voltage [V]: Zinc V, Fitting Position: LH, Operating Mode: Electric, Left-/right-hand drive vehicles: Steel, Lock System: Copper — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with AUDI, SEAT 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: 09066, 100134810, 115 145, 12134314 and 43 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FAST 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.
Door Lock buying guide
Why replace this part?
Door lock actuators use an electric motor and linkage to engage or disengage the door latch on central locking command. A failed actuator prevents remote locking from functioning on that door, creating a security vulnerability. The electric motor windings and plastic gear teeth inside the actuator are the most common failure points.
Signs you need a replacement
- One door not responding to the central locking remote
- clicking or grinding sound inside the door when locking
- door locking or unlocking intermittently
- door that must be locked manually while others lock automatically
- visible sluggish movement of the lock mechanism
When to replace
No set interval — actuators typically last 10–15 years or 100,000 cycles. Replace on failure. Access usually requires removing the door trim panel.
Suitable cars
Equivalent products (46)
Show all 46 OE numbers
Door Lock FAST FT00046 — compatible car models
| Car models | AUDI: A3 (8P1), A3 Sportback (8PA), A4 B7 (8EC), A4 B7 Avant (8ED), A4 B7 Convertible (8HE), A6 Allroad C6 (4FH), A6 C6 (4F2), A6 C6 Avant (4F5), A8 D3 (4E2, 4E8); SEAT: EXEO (3R2), EXEO ST (3R5) |
|---|---|
| Engines | 1.2 TSI; 1.6; 1.8 T; 2.7 TDI quattro; 2.0 TDI; 2.8 FSI |
| Year of manufacture | 2002-2015 |
| Manufacturer article number (MPN) | FT00046 |
| OE part numbers | 4F0839015, 8E0 839 015AA |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
FAST ft00046 . Fitting Position: LH. Left-/right-hand drive vehicles: 1. Lock System: 4. Operating Mode: EL. paired article number: FT00047. Voltage [V]: 12 V
- 1x Door Lock
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 Door Lock compatible with my car?
This Door Lock fits AUDI, SEAT 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 FAST Door Lock have?
This FAST Door Lock has the following specifications: Voltage [V]: 12 V; Fitting Position: LH; Operating Mode: EL; Left-/right-hand drive vehicles: 1; Lock System: 4; paired article number: FT00047. Check the full specifications table above for complete details.
What OE part numbers does this Door Lock replace?
This Door Lock replaces OE part numbers: 4F0839015, 8E0 839 015AA. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Door Lock cost?
This FAST Door Lock is available for £53.99. Door Lock prices vary depending on brand, specifications, and vehicle compatibility. FAST parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Door Lock?
Signs include the door not locking or unlocking with the key fob, difficulty turning the key in the barrel, the latch not engaging properly when the door is closed, or the door opening without a handle pull due to a worn latch.
What tools do I need to replace a Door Lock?
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 Door Lock fitted by a professional mechanic.
Can I use this part as a replacement for OE 4F0839015?
Yes, this FAST Door Lock is a direct replacement for OE part number 4F0839015. 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.
