Audi A4 B9 Front Brake Caliper Kit | 9N 6-Piston
Reviewed by the SteedLuxParts engineering team
Last updated October 22, 2026
Audi A4 B9 front brake caliper kit for 2015–2024 8W cars, with 6-piston 9N calipers, 380/400/410 mm rotor rows and 19–21 inch wheel checks.
Set price
Quantity pricing updates automatically
$618.00
/ set
1-9 sets
Wholesale tier pricing Lower pricing for larger orders
1-9 sets
Sample or retail orders
$618.00/ set
10-49 sets
Small wholesale batch Recommended
$558.00/ set
Save $60 per set
Product details
2 calipers; 2 adapter brackets; 2 rotors; 1 brake pad set; 2 braided brake hoses; 2 aluminium hubs
Shipping and lead time
Ships to
United States
Shipping
Calculated by destination
Delivery
about 20-35 business days
Fitment information
We check OEM wheels with the vehicle year and VIN in our database. For aftermarket wheels, we also need ET, J, spoke, and inner-barrel details.
Warranty and returns
5 years against manufacturing/quality defects only View the full returns policy.
Product information
Product Details & Fitment
The application shown on this page is a reference configuration. It is not a universal-fit claim and it is not the only vehicle application we can review.
The short answer
- This is one front-axle kit for the Audi A4 B9 (8W), scoped by the seller to 2015–2024 builds.
- One set lists 2 calipers, 2 brackets, 2 rotors, 1 pad set, 2 hoses and 2 hubs.
- Rotor rows are 380 mm on 19 inch, 380/400 mm on 20 inch and 400/410 mm on 21 inch wheels.
- VIN, original front brakes, wheel data, rotor thickness and measured clearance still have to be reviewed before we release the build.
| Brand | steedluxparts | Category | Audi A4 |
|---|---|---|---|
| SKU | SLP-AUDI-A4B9-F-9N-6P-380-410MM | Minimum order quantity | 1 set |
| Compatible Vehicles | Audi A4 B9 (8W) | Year Range | 2015–2024 |
| Supplementary Note | To be confirmed from the VIN and option codes | Brake Line / Interface Notes | 2 braided hoses included; fitting and routing To be confirmed from the vehic |
| Front / Rear Axle | Front axle | Installation Type | Confirm before order |
| Additional Setup Required | Depends on the vehicle | Package Scope | Front axle kit |
| Brake Kit Notes | Akebono 9N; 6-piston; rotor rows 19 inch 380 mm, 20 inch 380/400 mm, 21 inch 400/410 mm; rotor thickness To be confirmed | Included Brake Parts | 2 calipers; 2 adapter brackets; 2 rotors; 1 brake pad set; 2 braided brake hoses; 2 aluminium hubs |
| Warranty | 5 years against manufacturing/quality defects only | Packaging | Standard export packaging |
| Carton Size | 45 x 45 x 45 cm | Gross Weight | about 45 kg (measured) |
| MOQ | 1 set |
What the B9 Kit Changes
This Audi A4 B9 front brake caliper kit is a 6-piston front-axle conversion, not a routine brake replacement.
The product on this page
Akebono’s 6-pot family has three pistons per side. This record applies a 9N caliper to the A4 B9 front axle with vehicle-specific brackets and hubs.
We start with the car and wheel because the 8W range includes different builds. A badge, wheel diameter or marketplace listing is not approval.
What this front kit leaves alone
Rear discs, pads, calipers and the electronic parking brake stay outside this set. A complete car needs a separate quotation.
No stopping-distance, fade or temperature test is attached, so the page makes no performance promise.
Build Data That Opens the Quote
Four records open the quote: the car, original front brakes, intended wheel and rotor interface. Missing fields stay visible; we don’t borrow them from another A4 generation.
| Control field | On this record now | Send with the RFQ |
|---|---|---|
| Vehicle identity | Audi A4 B9 (8W), 2015–2024 product window | VIN and model year |
| Original front brakes | To be confirmed from the VIN | VIN or option codes and a photo of the existing front caliper |
| Factory wheel | Confirmed from the vehicle record | Diameter, width and offset; no separate ET/J request |
| Aftermarket wheel | Needs a wheel-specific check | Diameter, width, ET, J and spoke/barrel photos |
| Rotor interface | Custom per vehicle model | Existing rotor diameter and thickness; remaining data follows review |
| Rim clearance | 6.5 mm seller threshold for review | The measured rotor-edge-to-rim gap with the intended wheels fitted |
The seller scope ends at 2024. Wikipedia records later market production, but this quotation does not extend automatically.
Rotor Rows for 19, 20 and 21 Inch Wheels
The 19–21 inch range has three rotor rows. A wheel size does not approve the assembly, and each row’s thickness is To be confirmed.
| Wheel size | Rotor diameter on the record | What still has to be measured |
|---|---|---|
| 19 inch | 380 mm | Rotor-edge-to-rim gap, spoke path, aftermarket ET/J and rotor thickness |
| 20 inch | 380 mm or 400 mm | Which rotor row you want, the same rim measurements and the final wheel drawing |
| 21 inch | 400 mm or 410 mm | The rotor row, inner-barrel contour and caliper-to-spoke clearance on the actual wheel |
The 6.5 mm note
The 6.5 mm figure is a review requirement. The seller says a rotor-edge-to-rim gap below 6.5 mm may need a spacer; insufficient clearance prevents the wheel from fitting. We keep it conditional—not a promise to make any wheel fit.
Market references: a B9 spacer guide discusses 3 mm to 10 mm spacers, another lists a 355 x 32 mm kit, and a B9-family build cites a 380 x 36 mm rotor. None sets this SKU’s thickness.
What Sits Inside One Front Set
The counts come from the product record. The third column names what the quotation still has to close.
| Component | Quantity | Interface still to be reviewed |
|---|---|---|
| Akebono 9N caliper, 6-piston | 2 | Casting ID, pad shape and mounting geometry |
| Adapter bracket | 2 | A4 B9 upright bolt pattern and bracket geometry |
| Brake rotor | 2 | Diameter and thickness by row; final data in the quotation |
| Brake pad set | 1 set | Pad shape and selected friction material |
| Braided brake hose | 2 | Fitting type and routing on the car |
| Aluminium hub | 2 | Hat height, centre bore, PCD and hub-face fit |
Carton: 45 x 45 x 45 cm; measured gross weight about 45 kg. Calipers-only needs a separate quotation.
Materials Listed, Evidence Still Missing
Listed build options
- Calipers: cast aluminium standard; forged aluminium or titanium on request.
- Brackets and hubs: aluminium options listed as 6061, 7075 and 8085.
- Rotors: seller wording says forged high-carbon iron; alloy cast iron or carbon-ceramic on request.
- Pads: ceramic standard; metallic, semi-metallic, carbon-ceramic or carbon-carbon on request.
- Finishes: caliper, bracket and hub colours, plus a custom logo.
What the file can prove
It proves what the seller lists, not that every grade is independently checked. No drawing, material sheet, template or test report is attached.
Two terms stay open. The 8085 alloy has no accessible reference in this review, and the forged rotor wording has no manufacturing record. Put either option in writing before using it in a customer job.
How Owners and Shops Move an Order
Owner or individual buyer
Start with the VIN, model year, wheel and a photo of the current front brake. For an aftermarket wheel, add ET, J and an inner-barrel photo. We’ll return the rotor row and quotation before machining.
No price is published on this record. Caliper finish, rotor row, material, quantity and destination all affect the quote.
Tuning shop, repair shop or reseller
Send one vehicle file per customer build, then add quantity and destination. A one-set sample lets a shop approve the file before planning stock.
Colour or logo work follows the fitment decision and never replaces a wheel check.
- MOQ: 1 set.
- Production: 3–7 business days after the fitment file and deposit are in hand.
- Delivery: about 20–35 business days.
- Payment: production starts after a 30% deposit is received; the balance and payment route follow the quotation.
- Warranty: 5 years against manufacturing or quality defects only. Wear, incorrect installation and unauthorised changes are not treated as manufacturing defects.
Questions That Change the Rotor Choice
Why is the rotor thickness still To be confirmed?
The brief supplied diameters but no thickness. We won’t borrow a figure from another kit; the quotation must state it.
Can I order the calipers on their own?
Calipers-only is not the package described here. Removing other parts changes the quotation and the interfaces you must supply.
Does a 21 inch wheel guarantee that the 410 mm row clears?
No. A 400 or 410 mm row can be planned, but spoke profile, inner barrel, offset and measured gap still decide.
Do I need to send ET and J for an OEM wheel?
For an OEM wheel, we begin with VIN, year, diameter and width. Aftermarket wheels need ET, J and barrel/spoke photos.
Will this kit also replace my rear brakes?
No. It supplies the front axle only. Rear brakes and the parking-brake arrangement need a different product record.
Reference Images and the RFQ Path
Wikipedia’s A4 entry identifies the B9/8W generation from 2015. Audi’s A4 Avant photo record covers the other end of this product window. Neither source covers brackets, hubs, rotor thickness or clearance. Reviewed by the SteedLuxParts product desk on 2026-10-22; independent fitment review pending.
Send the front-axle file
Send the model year, VIN, original front-brake photo, wheel data, spoke and barrel photos, destination and quantity. A planning rule is a release requirement, not an approval.
Fitment resources before ordering
OE lookup, wheel size, packing, RFQ.
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02 Buyer resource Buyer FAQ.Fitment, warranty, packing, quote answers.
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07 Buyer resource Solutions and technical guide.Fitment, installation and packing checks.
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