Shipping dimensions pending
We're verifying exact measurements to ensure accurate shipping costs and delivery times for your location. (Except UAE)
Contact our sales team to get an exact quote
Vendor: European Autospares Trading LLC
Genuine Porsche Suspension Auxiliary Spring Coil 99633310503
Dhs. 255.00
Vendor: European Autospares Trading LLC
Genuine Porsche Suspension Auxiliary Spring Coil 99633310503
Dhs. 255.00
Description
xProduct Overview
The Genuine Porsche Suspension Auxiliary Spring Coil (OE 99633310503) is the original factory bump stop that protects your Porsche's rear shock absorbers from damaging bottom-out impacts. Mounted on the rear shock absorber, this auxiliary spring acts as a progressive cushion: under normal driving it barely engages, but when the suspension compresses hard over a bump or pothole, it absorbs the final travel so the damper never slams into its end stops. Manufactured to Porsche's exact factory specification, it keeps the rear suspension riding exactly as the chassis was tuned.
Part Numbers & Reference Codes
OE part number: 99633310503. Always order and verify by this Porsche part number to ensure you receive the correct original component for your vehicle.
Vehicle Compatibility & Fitment
Auxiliary springs vary across Porsche model years and suspension codes, so the correct variant depends on your exact car. This is a genuine Porsche OE auxiliary spring for rear shock absorbers; confirm it matches your vehicle by sharing your VIN with our parts team before ordering, and we will verify fitment against the factory catalogue.
Key Features & Benefits
- Factory compression behaviour: genuine rubber compound and geometry, so the rear damper assembly cushions exactly as Porsche tuned it.
- Protects expensive hardware: bottom-out impacts are absorbed instead of travelling into the damper internals and strut mountings.
- Silences rear clunks: replaces crumbling or missing bump stops — a common cause of harshness and knocking from the rear.
- Direct fit, no modification: seats straight onto the shock absorber piston rod during normal damper service.
Technical Specifications
| OE Part Number | 99633310503 |
| Brand | Porsche |
| Product Type | Suspension Auxiliary Spring / Bump Stop |
| Position | Rear axle, on the shock absorber |
| Condition | New, Genuine OEM |
| Category | Suspension & Steering Parts |
| Fitment | Confirm exact application with your VIN |
Installation Position & Fitment Notes
This auxiliary spring installs on the rear shock absorber, seating onto the damper assembly before reassembly. It is common practice to replace both rear units together and to inspect the accompanying bump-stop hardware while the suspension is apart. Confirm the exact application for your car by VIN before ordering.
Product Brand, Type & Condition
Brand: Porsche. Type: rear shock absorber auxiliary spring (bump stop). Condition: brand-new genuine OEM part, supplied exactly as the factory produces it.
What’s Included in the Box
This listing includes one (1) Genuine Porsche Suspension Auxiliary Spring Coil, OE part number 99633310503, as supplied by the factory. One unit is correct for each rear corner.
Installation Requirements
Fitting is straightforward for a qualified technician during shock absorber service: the old auxiliary spring is removed and the new genuine unit is seated on the damper before reassembly. Professional installation is recommended, with both rear units renewed together.
Warranty & Returns
This brand-new genuine part is covered against manufacturing defects, and your statutory consumer rights apply in the UAE. If the part arrives damaged or is incorrect due to our error, we will replace or refund it.
Confirm Fitment & Order
Protect your rear suspension the factory way. Order the Genuine Porsche Suspension Auxiliary Spring Coil 99633310503 from European Autospares Trading LLC — shipped from Dubai with worldwide delivery. Not sure it fits? Contact us with your VIN and our parts team will confirm before you buy. Overhauling the dampers? You may also like the Genuine Porsche Suspension Shock Absorber Damper 99633305199 or the Genuine Porsche Additional Spring For Shock Absorber 97034330103, or browse all genuine Porsche spare parts.
Fitment Details
xPORSCHE SUSPENSION FITMENT GUIDE
| Model | Application | Year Range |
|---|---|---|
| Porsche 911 Carrera / Carrera 4 (996) | Rear shock absorber auxiliary spring | 1998–2005 |
| Porsche 911 Carrera 4S / Turbo / GT2 / GT3 (996) | Rear shock absorber auxiliary spring | 2001–2005 |
| Porsche 911 Carrera / Carrera S / Carrera 4S / Turbo (997.1) | Rear shock absorber auxiliary spring | 2005–2008 |
Technician's Advisory: Replace bump stops and auxiliary springs in axle pairs, and inspect the shock absorber dust boots at the same time — perished boots let grit reach the damper rod seal.
Important: This genuine Porsche part is listed by OE part number 99633310503. Exact compatibility depends on the model, variant, production date and equipment level. Send your complete VIN to the European Autospares parts team and we will verify this is the correct part for your vehicle.
FAQs
xFrequently Asked Questions
Yes. The 99633310503 is a genuine Porsche OE auxiliary spring, made to the factory specification for the shock absorber — not a universal bump stop. Buying genuine means the length, profile, and rubber compound match the original exactly, so the damper assembly cushions hard impacts and rides exactly as Porsche tuned it.
Auxiliary springs vary across model years and suspension codes, so always confirm fitment with your VIN before ordering. Send your complete VIN to our parts team and we will verify the 99633310503 against the Porsche factory catalogue for your exact car. This avoids the cost and delay of ordering the wrong part.
The classic sign is a harsh metallic clunk when the rear wheels hit a sharp bump — the damper reaching its end stop unprotected. You may also notice a harsher ride over speed bumps and broken tarmac. Because the rubber hardens and cracks with age and heat, inspect the auxiliary springs whenever the dampers are serviced.
This is a brand-new genuine Porsche part, supplied exactly as the factory produces it in original packaging. It arrives ready to fit with the factory rubber compound and geometry intact. Because it is new OE stock, you get the same compression behaviour and durability as the part originally fitted to the car.
This brand-new genuine part is covered against manufacturing defects, and your statutory consumer rights apply in the UAE. If the part arrives damaged or is incorrect due to our error, we will replace or refund it. We recommend VIN verification before ordering — contact us if you are unsure about fitment.
Found It Cheaper.?
xShipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
- Choosing a selection results in a full page refresh.
