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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Number of pins | 7 -pin connector |
| Rated Voltage [V] | 12 V |
OE numbers (1)
Search by this OE number to find compatible parts
- AUDI—4A0 905 351
Where this part fits
Original-fit position for OE 4A0905351. The red ring marks where this part installs on the vehicle.
About this product
The TOPRAN Switch Unit Ignition System (109 881) 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: Number of pins: Ceramic -pin connector, Rated Voltage [V]: Zinc V, Ignition Coil: 34, Connector Shape: Cast Iron. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit AUDI 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: 05013, 0882007, 10063, 1192100402 and 38 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN is a recognised supplier of automotive ignition 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 with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
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
Switch Unit Ignition System TOPRAN 109 881 — compatible car models
| Car models | AUDI: 100 C4 Avant (4A5), 100 C4 Saloon (4A2), 80 B4 Avant (8C5), 80 B4 Saloon (8C2), A4 B5 (8D2), A4 B5 Avant (8D5), A6 C4 (4A2), A6 C4 Avant (4A5) |
|---|---|
| Engines | 2.6; 2.4 |
| Year of manufacture | 1990-2002 |
| Manufacturer article number (MPN) | 109 881 |
| OE part numbers | 4A0 905 351 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 109881 . Connector Shape: 3. Ignition Coil: 34. Number of pins: 7 -pin connector. Rated Voltage [V]: 12 V
- 1x Switch Unit Ignition System
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 4–8 business days
- Order before 5pm — ships the next working day
- 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 Switch Unit Ignition System compatible with my car?
This Switch Unit Ignition System fits AUDI 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 Switch Unit Ignition System have?
This TOPRAN Switch Unit Ignition System has the following specifications: Number of pins: 7 -pin connector; Rated Voltage [V]: 12 V; Ignition Coil: 34; Connector Shape: 3. Check the full specifications table above for complete details.
What OE part numbers does this Switch Unit Ignition System replace?
This Switch Unit Ignition System replaces OE part numbers: 4A0 905 351. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Switch Unit Ignition System cost?
This TOPRAN Switch Unit Ignition System is available for £35.99. Switch Unit Ignition System 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 Switch Unit Ignition System?
Regular inspection of your Switch Unit Ignition System 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 Switch Unit Ignition System?
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 Switch Unit Ignition System fitted by a professional mechanic.
Can I use this part as a replacement for OE 4A0 905 351?
Yes, this TOPRAN Switch Unit Ignition System is a direct replacement for OE part number 4A0 905 351. 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.
