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Details
| Specification | Value |
|---|---|
| Brand | AJUSA |
| Height [mm] | 16 mm |
| Inner Diameter [mm] | 5.5 mm |
| Outer Diameter [mm] | 9.5 mm |
OE/OEM numbers (3)
Where this part fits
Original-fit position for OE 642501. The red ring marks where this part installs on the vehicle.
![-SEAL,VALVE STEM — Opel ASTRA-G ( 1998 - 2010) — E ENGINE AND CLUTCH › 11 Z22SE[L61] PETROL ENGINE](/_next/image?url=https%3A%2F%2Fcdn.carparts247.co.uk%2Fdiagrams%2Foem%2Fopel%2Ft98%2F9449a683c2123324%2F2.webp&w=3840&q=75)
About this product
When seal ring valve stem performance matters, the AJUSA 12020000 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Height [mm]: Silicone mm, Inner Diameter [mm]: Rubber, Rubber mm, Outer Diameter [mm]: Stainless Steel, Rubber mm. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with ALFA ROMEO, BUICK, CADILLAC, CHEVROLET and 11 other makes 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: 007.030, 1649082, 642501, 70-34264-00 and 4 more. Matching these numbers confirms a like-for-like replacement with no loss of function. AJUSA 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 (5)
Seal Ring Valve Stem AJUSA 12020000 — compatible car models
| Car models | ALFA ROMEO: 159 (939), 159 Sportwagon (939), BRERA (939), SPIDER (939); BUICK: LA CROSSE Saloon, REGAL Saloon; CADILLAC: BLS, BLS Wagon; CHEVROLET: ALERO, ASTRA Estate, ASTRA Hatchback, CAPTIVA (C100, C140), CAPTIVA SPORT, CAVALIER Coupe, CAVALIER Saloon, COBALT, COBALT Coupe, EQUINOX (+9 more); FIAT: CROMA (194); FISKER: KARMA; GMC: TERRAIN |
|---|---|
| Engines | 1.9 JTS (939AXA1B); 1.9 JTS (939BXA1B); 2.2 JTS (939.DXB11); 2.2 JTS (939EXB1B, 939EXB11); 2.4; 2.0; 2.0 T; 2.2; 2.0 SS; 2.4 Hybrid; 2.0 LPG; 2.2 16V; 2.0 Range Extender |
| Year of manufacture | 1994-2013 |
| Manufacturer article number (MPN) | 12020000 |
| OE part numbers | 642501, 71739347, 90537241 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
AJUSA 12020000 . Height [mm]: 16 mm. Inner Diameter [mm]: 5,5 mm. Outer Diameter [mm]: 9,5 mm
- 1x Seal Ring Valve Stem
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 Seal Ring Valve Stem compatible with my car?
This Seal Ring Valve Stem fits ALFA ROMEO, BUICK, CADILLAC, CHEVROLET, FIAT and 10 more 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 AJUSA Seal Ring Valve Stem have?
This AJUSA Seal Ring Valve Stem has the following specifications: Height [mm]: 16 mm; Inner Diameter [mm]: 5,5 mm; Outer Diameter [mm]: 9,5 mm. Check the full specifications table above for complete details.
What OE part numbers does this Seal Ring Valve Stem replace?
This Seal Ring Valve Stem replaces OE part numbers: 642501, 71739347, 90537241. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Seal Ring Valve Stem cost?
This AJUSA Seal Ring Valve Stem is available for £3.99. Seal Ring Valve Stem prices vary depending on brand, specifications, and vehicle compatibility. AJUSA parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Seal Ring Valve Stem?
Regular inspection of your Seal Ring Valve Stem 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 Seal Ring Valve Stem?
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 Seal Ring Valve Stem fitted by a professional mechanic.
Can I use this part as a replacement for OE 642501?
Yes, this AJUSA Seal Ring Valve Stem is a direct replacement for OE part number 642501. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the AJUSA 12020000 the same as the AJUSA 12000600?
No, while both are Seal Ring Valve Stem parts, they are different products. The AJUSA 12020000 has Height [mm]: 16 mm, Inner Diameter [mm]: 5,5 mm, Outer Diameter [mm]: 9,5 mm. The AJUSA 12000600 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
