Bilstein B3 40-232003 Rear Right Air Suspension Spring Airbag (OSR/RHS) for BMW 5 Series E39 Touring Estate/Wagon 1996-2004 – Rear Self/Load-Levelling Pneumatic Bellows OE Replacement Air Ride Bladder

Bilstein B3 Rear Right Pneumatic Spring for BMW 5 Series E39 Touring 1996 to 2004 40-232003

Cure a sagging back end and bring back that smooth, planted BMW feel with the Bilstein B3 rear offside pneumatic spring, part number 40-232003. This factory-spec bellows unit is built for the E39 estate with self-levelling on the rear axle and delivers the ride height accuracy, comfort and stability your 5 Series deserves. It is a direct-fit right-hand rear airbag for the Touring body, ideal when your original bladder is leaking, cracked or tired.

What you will feel

• Factory-correct ride height and confident handling on British roads
• Fast height control for towing, passengers and heavy loads
• Consistent support and sure-footed stability in all conditions
• High safety margin with predictable behaviour at speed
• Designed for models where the shock absorber is separate from the air bellows

Why we rate it

We run these on our own cars and customer builds. Feedback is the same every time. Quiet operation, level stance, proper comfort and long-term dependability. It is the smart fix for sinking suspension and a better choice than cheap pattern parts.

Fitment details

• Position Right rear, offside rear, OSR
• Vehicle BMW 5 Series E39 Touring estate only
• Years 09.1996 to 06.2004
• Compatible engines 520i, 523i, 525i, 528i, 530i, 540i, 520d, 525d, 525tds, 530d
• Suspension type For vehicles with standard or sports chassis using rear self-levelling
• Spring design Pneumatic bellows, airbag, air bladder

Key features at a glance

• Original driving character with refined comfort
• Quick levelling response to changing loads
• Stable damping support under any payload
• Generous performance reserves for safety

Part numbers and identifiers

• Bilstein part number 40-232003
• SKU BILSTEIN-40-232003
• EAN 4025258739775
• UPC 651860741048
• Manufacturer Bilstein

Professional fitting

Want it installed properly the first time. Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote. We can supply and fit, perform a system check and advise on any additional rear suspension parts your BMW may need.

Compatibility check before dispatch

We verify fitment before shipping. Add your UK registration or last 7 of your VIN at checkout and we will confirm you are getting the correct right-hand rear unit for your E39 estate.

Looking for the nearside

The matching left rear version is Bilstein 40-231990.

Search-friendly terms

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