Bilstein B12 Pro Kit Coilovers Audi A4 B9 Estate 53mm Strut Quattro 15+

Bilstein B12 Pro-Kit Suspension Kit for Audi A4 B9 Estate 53mm Strut Quattro (2015 onwards) – Lower Stance and Sharper Handling

The Bilstein B12 Pro-Kit is a complete, ready-matched suspension upgrade for the Audi A4 B9 Estate 53mm Strut Quattro. It replaces all four factory dampers and springs with shortened Bilstein B8 performance dampers and Eibach Pro-Kit lowering springs, so the car sits lower and feels tighter without becoming harsh on UK roads.

Because the dampers are shortened to suit the lower spring height, they keep enough working stroke to control the body properly, which a set of lowering springs on worn or standard dampers can't do. The kit is developed for this specific car and uses the factory spring seat design, so it bolts in without changes to the bodywork or wheel arches.

Performance

• Ride height: Fixed lowering, typically 30-50mm depending on the car
• Damping: Fixed, tuned for this car
• Damper design: Monotube gas-pressure

Ride-height figures are Bilstein's application data for this part number, measured against the car's standard ride height. The actual change depends on the car's engine, equipment and the condition of the parts being replaced.

Key Features

• Bilstein B8 shortened performance dampers paired with Eibach Pro-Kit springs
• Moderate, fixed drop that suits a daily-driven car
• Less body roll and more precise turn-in than the standard suspension
• Dampers and springs developed and tested together for this application
• Direct replacement for the factory parts: no cutting or drilling
• Springs supplied with a parts certificate

What's in the Kit?

• 2 x front Bilstein dampers (strut or strut insert, as the car requires)
• 2 x rear Bilstein dampers
• 2 x front Eibach Pro-Kit lowering springs
• 2 x rear Eibach Pro-Kit lowering springs

Please note: the photo shows a typical Bilstein B12 kit. The parts for your car are specific to it and will differ in appearance. Top mounts and fitting hardware are not included unless listed above.

Fitment

• Audi A4 B9 Estate 53mm Strut Quattro (2015 onwards)
• Engines: 2.0 TFSI quattro 183/ 40/45 TFSI Mild Hybrid quattro 2.0 TDI quattro 110/120/ 40 TDI quattro
• A4 Avant quattro only
• 53 mm front strut housing diameter

Not suitable for: other versions of this car, which have their own Bilstein B12 Pro-Kit part numbers: Audi A4 1.4 B9 15+, Audi A4 1.4 TFSI 2.0 TDI 3.0 B9 15+, Audi A4 2.0 TDI 2.0 TFSI 3.0 TDI B9 Quattro 15+, Audi A4 3.0 TDI B9 15+, Audi A4 8W2 8WC 8W5 8WD B9 F5A F5F 15+ and others; cars with factory electronic damping or self-levelling suspension unless stated above; other generations, body styles or drivetrains not listed above.

Installation

Fitting replaces the dampers and springs at all four corners. Where the car has front struts, they must be dismantled with spring compressors to swap the springs, and where the car uses a strut insert the cartridge cap nut is tightened to 130 Nm with the Bilstein cartridge tool. Check the top mounts, bearings, bump stops and dust covers while everything is apart and replace any that are worn. Let the springs settle for a few hundred miles, then have a four-wheel alignment carried out and check the headlight aim. We recommend professional fitting.

Upgrade Further

Bilstein also makes other suspension options for this car: Bilstein B16 PSS10 for the Audi A4 49mm B9 15+, Bilstein B16 DampTronic for the Audi A4 B9 15+.

Will this fit every Audi A4 B9?

No. Bilstein makes separate kits for different versions of this car, split by body style, drivetrain, engine or axle load. This one is for the Audi A4 B9 Estate 53mm Strut Quattro (2015 onwards). Check the Fitment section and the Not suitable for line, and contact us with your registration if you're unsure.

How much lower will my car sit?

Bilstein doesn't list an exact figure for this part in our data. Across the range the drop is fixed lowering, typically 30-50mm depending on the car; contact us and we'll check the figure for your car.

Is the ride height adjustable?

No. The B12 gives a fixed drop set by the springs. If you want to set the height yourself, look at Bilstein's B14 or B16 coilovers for your car.

Can I fit this to a car with electronic or adaptive dampers?

This kit uses conventional dampers. If your car has factory electronic damping, check the Fitment notes above, as Bilstein makes separate DampTronic and EVO SE kits for many of these cars.

Do I need a wheel alignment after fitting?

Yes. Changing the ride height changes the suspension geometry, so a four-wheel alignment is needed after fitting. Let the springs settle for a few hundred miles first.

Is it road legal in the UK?

Yes, this kit is designed for road use. As with any suspension modification, you should tell your insurer once it has been fitted.

What's the difference between the B12 Pro-Kit and B12 Sportline?

Both pair Bilstein dampers with Eibach springs. The Pro-Kit gives a moderate drop for everyday comfort; the Sportline sits lower and feels firmer. Not every car has both versions available.

What type of dampers does it use?

Monotube gas-pressure, according to Bilstein's data for this part number. Gas-pressure dampers resist fading when they get hot during hard driving.

Is there a warranty?

Yes. Bilstein suspension is covered against defects in materials and workmanship. Contact us with your order number if you have any problem.