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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Diameter [mm] | 4 mm |
OE/OEM numbers (4)
Search by this OE number to find compatible parts
- AUDI / CUPRA / PORSCHE / SEAT / SKODA / VAG / VW—030 905 423
- AUDI / CUPRA / PORSCHE / SEAT / SKODA / VAG / VW—030 905 423A
- AUDI / CUPRA / PORSCHE / SEAT / SKODA / VAG / VW—036 905 423
- AUDI / CUPRA / PORSCHE / SEAT / SKODA / VAG / VW—036 905 423B
Where this part fits
Original-fit position for OE 030905423A. The red ring marks where this part installs on the vehicle.

About this product
The TOPRAN Plug Sleeve Ignition System (100 598) 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: Diameter [mm]: Copper mm, Ignition Cable: Copper. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. This part supersedes original equipment references: 030 905 423, 030 905 423A, 036 905 423, 036 905 423B and 1 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 from our UK warehouse with a 30-day money-back guarantee and free 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
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (2)
Plug Sleeve Ignition System TOPRAN 100 598 — compatible car models
| Manufacturer article number (MPN) | 100 598 |
|---|---|
| OE part numbers | 030 905 423, 030 905 423A, 036 905 423, 036 905 423B |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 100598 . Diameter [mm]: 4 mm. Ignition Cable: 4
- 1x Plug Sleeve Ignition System
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 Plug Sleeve Ignition System compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Plug Sleeve Ignition System fits. All fitment data is verified through TecDoc.
What specifications does this TOPRAN Plug Sleeve Ignition System have?
This TOPRAN Plug Sleeve Ignition System has the following specifications: Diameter [mm]: 4 mm; Ignition Cable: 4. Check the full specifications table above for complete details.
What OE part numbers does this Plug Sleeve Ignition System replace?
This Plug Sleeve Ignition System replaces OE part numbers: 030 905 423, 030 905 423A, 036 905 423, 036 905 423B. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Plug Sleeve Ignition System cost?
This TOPRAN Plug Sleeve Ignition System is available for £0.99. Plug Sleeve 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 Plug Sleeve Ignition System?
Regular inspection of your Plug Sleeve 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 Plug Sleeve 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 Plug Sleeve Ignition System fitted by a professional mechanic.
Can I use this part as a replacement for OE 030 905 423?
Yes, this TOPRAN Plug Sleeve Ignition System is a direct replacement for OE part number 030 905 423. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.