BILSTEIN B4 Rear Shock Absorber for Audi A4 B8, Audi A5 8T/8F

OE replacement shock absorbers in OE quality

The Bilstein B4 is the ideal OE replacement damper: its specification and function match the original equipment exactly, and it is made to the same quality standards as the OE part – a dependable like-for-like replacement.

The B4 at a glance

Drives like a new car: the B4 restores the car's original handling. Available for almost every model, it gives consistent damping, precise steering and safe handling.

Dependable in every situation

The B4 is balanced and very well suited to everyday use. In town, on country roads or on the motorway it gives consistent damping, precise handling and smooth, predictable behaviour. Made to OE specification, it delivers safety, control and comfort in every vehicle class.

Product benefits

The B4 brings back the original drive, just like on day one. Made to top OE standards in the same factories as Bilstein's original equipment, it performs like the damper in a new car. It covers almost every vehicle and comes in versions for each equipment and model variant.

• Factory-spec tuning for as-new ride quality
• 100% OE quality to the highest original-equipment standards
• Patented OE technologies on some models (e.g. DampMatic)
• Flexible fitting: available and fittable per axle, easy to install thanks to the original design
• Fits over 90% of all European vehicles

What makes B4 stand out

• Made to top OE standards in the same factories as the original part*, the B4 brings back the new-car feeling – safety, precise handling and comfort as on day one. *All aftermarket products that Bilstein makes as OE parts are produced in the OE plants, and every product is made to OE standards.
• Consistent damping at any load, from city driving to a fully loaded holiday trip. With coverage of well over 90% of European vehicles, a B4 is available straight away for nearly every model.
• Flexible fitting: available and fittable per axle as needed, and as easy to install as any OE damper thanks to its original design.
• Technology lead: depending on the model, fitted with patented technologies such as Bilstein's DampMatic system, known from OE.
• Intensive testing – long-term stress tests, extreme salt-spray tests, scratch tests and 1:1 checks before delivery – for maximum durability and quality.
• Each B4 is tailored to the exact equipment and model variant, so the result matches the original in every respect.

Where the B4 is used

• Safe on the road: in town, on country roads or the motorway, a new B4 gives excellent road holding and more grip, so the car reacts faster in an emergency and stopping distances are noticeably shorter.
• Everyday, family and holiday driving: plenty in reserve for stability, precise handling and safety, even on long trips with lots of luggage.
• For drivers who value comfort: if the car's original feel matters to you, the B4 is the right choice – its balanced tuning combines strong road holding with comfortable handling.
• Replacement for electronically controlled dampers: B4 DampTronic dampers use the full range of valve technology from Bilstein's OE development, tuned precisely to each car's control system.

Frequently asked questions

Which shock absorber do you recommend for my car?

B4 dampers are made and sold to OE specification, so the car's original ride height and tuning are kept; selection follows the car's specification. B6 and B8 dampers have their own tuning, set in road tests to Bilstein's "comfort and sport" philosophy. With OE functional dimensions both are height-neutral and need no registration. Thanks to its changed extended length, the B8 suits standard sports suspension as well as lowering or raising springs of up to 50 mm.

What is the difference between B4 and B6?

The B4 is an OE replacement that keeps the car's standard ride height and characteristics. The B6 is an improved OE replacement with its own road-test tuning and higher damping force; with OE functional dimensions it is height-neutral and needs no registration.

Which B4 can I fit (e.g. standard or sports suspension)?

B4 dampers are made to OE specification so the car's original handling is kept. Choose by vehicle specification, because damper, spring and top mount are tuned to work together.

Do you offer electronically adjustable dampers or kits that fit directly and keep the OE function (e.g. DCC, CATS, EDC, PASM)?

Yes – Bilstein offers plug-and-play solutions for many applications, marked "DT" (DampTronic). Whatever the car maker calls its electronic suspension, the catalogue lists the right match.

Can you email me the expert report for the dampers?

Dampers that match the OE functional dimensions do not need registration, so no type approval or parts certificate is needed. If they are used with lowering springs, the springs need a parts certificate / type approval, available from the spring maker.

Where can I get a GOCA certificate for Belgium or the Netherlands?

From Bilstein's regional trade partners.

How do I get expert reports?

All expert reports are in Bilstein's online catalogue, linked to the part number.

Is there installation information for workshops?

Dampers are fitted following the vehicle maker's instructions. For air springs and air suspension modules Bilstein provides installation videos and instructions, linked to the part number in its online catalogue.

Product details

• Bilstein part number: 19-171623
• Part type: Shock Absorber
• Fitting Position: Rear Axle
• Shock Absorber Design: Absorber does not carry a spring
• Shock Absorber Mounting Type: Bottom eye; Top pin
• Shock Absorber Type: Gas Pressure
• Shock Absorber System: Twin-Tube
• EAN: 4025258658663
• Bilstein series: BILSTEIN - B4 OE Replacement
• Trade number: BNE-H162

Vehicle Fitment

Detailed applications

📦 Regal Autosport Shipping Policy

Shipping Destinations

We proudly ship our products across the UK, Europe, the USA, Australia, South East Asia, and other locations globally.There are no regions we restrict shipping to.

Carriers and Delivery Times

• United Kingdom: Royal Mail for small items; DPD Local for parcels up to 30kg.
  Delivery estimate: 1–2 business days.
  

• International:
  

• Small packages: Royal Mail (postal service)
  

• Small/medium/large parcels: DHL Express.
  Delivery estimate: 2–15 business days, depending on destination.
  

Please note: We do not ship on weekends or UK Bank Holidays. Orders placed after 2 PM will be processed the following business day.

Order Processing

Orders placed before 2 PM are typically processed and dispatched the same day.
Orders placed after 2 PM will be processed on the next business day.

Shipping Costs

Shipping costs are calculated automatically at checkout based on the volumetric weight of your order.
We do not offer free shipping — instead, we focus on keeping product prices as competitive as possible.

Tracking

All orders are shipped via tracked and signed-for services.
Tracking information will be provided and can be accessed via:

• Your Regal Autosport account page in Shopify
  

• The respective courier’s website
  

Customs, Duties, and Taxes

• UK Customers: Prices include UK VAT.
  

• International Customers:
  

• UK VAT will be deducted at checkout.
  

• Customers are responsible for all customs duties, import taxes, and fees applicable in their country.
  

• Delivery times may be delayed by customs clearance — time is not of the essence for deliveries.
  

Lost or Damaged Items

In the rare case of lost shipments:

• If the courier confirms the parcel as lost, we will re-ship your order as quickly as possible.
  

For damaged shipments:

• Customers must assist us in submitting a claim with the courier.
  

• After confirmation, we will replace the item or offer a discount, depending on the situation.
  

We take great care in packaging, but please inspect your order upon arrival and contact us immediately if the item is damaged or missing.

Backorders

Orders containing backordered items will be dispatched once all items are available.
We do not split ship orders. If you require partial delivery, please place separate orders for in-stock and backordered items.

Local Pickup and Delivery

We do not offer local pickup or local delivery for online orders due to security verification policies.
However, customers are welcome to visit our store and pay via chip and PIN.

📦 Regal Autosport Shipping FAQs

Where do you ship to?

We ship across the UK, Europe, the USA, Australia, South East Asia, and worldwide.
 There are no regions we restrict shipping to.

Which carriers do you use?

• UK orders: Royal Mail (small items), DPD Local (parcels up to 30kg)
  
  

• International orders: Royal Mail (small packages) or DHL Express (larger parcels)
  
  

How long will my order take to arrive?

• UK deliveries: Typically 1–2 business days after dispatch.
  

• International deliveries: Usually 2–15 business days, depending on location.
  

Please note: We do not ship on weekends or UK Bank Holidays.

When will my order be dispatched?

Orders placed before 2 PM are usually dispatched the same business day.
 Orders placed after 2 PM are processed on the next working day.

How much does shipping cost?

Shipping costs are calculated at checkout based on the volumetric weight of your items.
 We do not offer free shipping — instead, we keep our product prices as competitive as possible.

Will I receive tracking information?

Yes!
All shipments are tracked and signed for. You’ll receive tracking information by email and can also track your order via:

• Your Regal Autosport account page
  

• The courier’s own website
  

Do I have to pay customs charges or import taxes?

• UK Customers: Prices include UK VAT.
  

• International Customers:
  

• We deduct UK VAT at checkout.
  

• You are responsible for any local customs duties, import taxes, or fees.
  

Delivery times may be affected by customs clearance, and time is not of the essence for international deliveries.

What happens if my order is lost or damaged?

• If your shipment is lost, we will re-ship your order once the courier confirms the loss.
  

• If your order is damaged, we will work with you to file a courier claim and either replace the item or offer a discount based on the situation.
  

Please inspect your delivery upon arrival and contact us immediately if there are any issues.

What if my item is on backorder?

Orders containing backordered items will be held until all items are available.
We do not split ship orders. If you require partial delivery, please place separate orders for in-stock and backordered items.

Can I collect my order in person?

We do not offer local pickup or local delivery for online orders due to security verification.
However, you are welcome to visit our store and pay via chip and PIN if you wish to purchase in person.