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Details
| Specification | Value |
|---|---|
| Brand | AIC |
| Thread Size | M12 x 1 |
OE/OEM numbers (4)
Search by this OE number to find compatible parts
- AUDI / VAG / VW—321 837 034B
- AUDI / VAG / VW—321 837 034C
- AUDI / VAG / VW—357 837 034
- AUDI / VAG / VW—813 837 035A
Where this part fits
Original-fit position for OE 357837034. The red ring marks where this part installs on the vehicle.
About this product
AIC Locking Pin Door Lock (50551) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Fitting Position: 56, Fitting Position: 57, Thread Size: M12 x 1 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Compatible with AUDI, VW 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: 00736, 07.53.009, 100007510, 103 542 and 11 more. Matching these numbers confirms a like-for-like replacement with no loss of function. AIC 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 (11)
Locking Pin Door Lock AIC 50551 — compatible car models
| Car models | AUDI: 100 C3 Avant (445, 446), 100 C3 Saloon (443, 444), 200 C3 Avant (447, 448), 200 C3 Saloon (447, 448), 80 B2 Saloon (811, 813, 814, 819, 853), 90 B2 (813, 814, 853), COUPE B2 (81, 855, 856), QUATTRO (85); VW: CORRADO (53I), DERBY (86C, 80), GOLF II (19E, 1G1), JETTA II (19E, 1G2, 165), PASSAT B2 (32B), PASSAT B2 Saloon (32B), PASSAT B2 Variant (33B), PASSAT B3/B4 (3A2, 35I), PASSAT B3/B4 Variant (3A5, 35I), POLO CLASSIC (86C, 80) (+7 more) |
|---|---|
| Engines | 1.8; 2.1 Turbo quattro; 2.1 5E; 1.3; 2.0; 1.6; 2.1 20V Turbo; 1.8 16V; 1.0; 1.9 D |
| Year of manufacture | 1978-2004 |
| Manufacturer article number (MPN) | 50551 |
| OE part numbers | 321 837 034B, 321 837 034C, 357 837 034, 813 837 035A |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
AIC 50551 Original AIC Quality. Fitting Position: 56. Fitting Position: 57. Thread Size: M12 x 1
- 1x Locking Pin 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 Locking Pin Door Lock compatible with my car?
This Locking Pin Door Lock fits AUDI, 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 AIC Locking Pin Door Lock have?
This AIC Locking Pin Door Lock has the following specifications: Fitting Position: 56; Fitting Position: 57; Thread Size: M12 x 1. Check the full specifications table above for complete details.
What OE part numbers does this Locking Pin Door Lock replace?
This Locking Pin Door Lock replaces OE part numbers: 321 837 034B, 321 837 034C, 357 837 034, 813 837 035A. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Locking Pin Door Lock cost?
This AIC Locking Pin Door Lock is available for £2.99. Locking Pin Door Lock prices vary depending on brand, specifications, and vehicle compatibility. AIC parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Locking Pin Door Lock?
Regular inspection of your Locking Pin Door Lock 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 Locking Pin 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 Locking Pin Door Lock fitted by a professional mechanic.
Can I use this part as a replacement for OE 321 837 034B?
Yes, this AIC Locking Pin Door Lock is a direct replacement for OE part number 321 837 034B. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
