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Details
| Specification | Value |
|---|---|
| Brand | CALORSTAT by Vernet |
| MPN | bs4521 |
| Thread Size | M12x1.5 |
| Operating Mode | ME |
OE/OEM numbers (9)
Where this part fits
Original-fit position for OE 1240590. The red ring marks where this part installs on the vehicle.
About this product
When stop light switch performance matters, the CALORSTAT by Vernet BS4521 delivers — built to the same dimensional and material standards as the original part it replaces. The part is built to the following specification: Thread Size: M12x1.5, Operating Mode: Mesh Filter, Sensor Type: 83. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Compatible with OPEL, SAAB, VAUXHALL 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: 02822, 0986343003, 1240590, 1735183 and 27 more. Matching these numbers confirms a like-for-like replacement with no loss of function. CALORSTAT by Vernet 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 (22)
Show all 22 OE numbers
Stop Light Switch CALORSTAT by Vernet BS4521 — compatible car models
| Car models | OPEL: ASCONA C Hatchback (J82), ASCONA C (J82), COMBO Box Body/MPV (71), CORSA A Hatchback (S83), CORSA A Hatchback Van (S83), CORSA A TR (S83), CORSA B Estate (S93), CORSA B Hatchback Van (S93), CORSA B (S93), MANTA B (58, 59) (+4 more); SAAB: 900 I (AC4, AM4), 900 I Combi Coupe, 900 I Convertible; VAUXHALL: COMBO Mk I (B) (S93), CORSA Mk I (B) (S93), CORSAVAN Mk I (B) Hatchback Van (S93), TIGRA Mk I (S93) |
|---|---|
| Engines | 1.3 N (F68, M68); 1.3 N (F11, M11, F69); 1.2; 1.0 (F08, M08, F68, M68); 1.0 (F08, W5L); 1.0 (F11, M11, F19, M19); 1.4 i 16V (F35); 1.2 (F08, W5L); 1.0 i 12V (F08, F68, M68); 1.3 N; 1.8 (F35, M35); 1.8 (F19, M19, N19); 2.5 i (P19); 1.4 16V (F07); 2.0 -16 (+4 more) |
| Year of manufacture | 1975-2009 |
| Manufacturer article number (MPN) | BS4521 |
| OE part numbers | 1240590, 8530792, 8548802, 8577702, 8577736, 900595582, 90059582, 9289311, ACU7434 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
CALORSTAT by Vernet bs4521 . Operating Mode: ME. Sensor Type: 83. Thread Size: M12x1.5
- 1x Stop Light Switch
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 Stop Light Switch compatible with my car?
This Stop Light Switch fits OPEL, SAAB, VAUXHALL 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 CALORSTAT by Vernet Stop Light Switch have?
This CALORSTAT by Vernet Stop Light Switch has the following specifications: Thread Size: M12x1.5; Operating Mode: ME; Sensor Type: 83. Check the full specifications table above for complete details.
What OE part numbers does this Stop Light Switch replace?
This Stop Light Switch replaces OE part numbers: 1240590, 8530792, 8548802, 8577702, 8577736, 900595582, 90059582, 9289311 and 1 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Stop Light Switch cost?
This CALORSTAT by Vernet Stop Light Switch is available for £6.99. Stop Light Switch prices vary depending on brand, specifications, and vehicle compatibility. CALORSTAT by Vernet parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Stop Light Switch?
Regular inspection of your Stop Light Switch 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 Stop Light Switch?
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 Stop Light Switch fitted by a professional mechanic.
Can I use this part as a replacement for OE 1240590?
Yes, this CALORSTAT by Vernet Stop Light Switch is a direct replacement for OE part number 1240590. 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.
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