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Details
| Specification | Value |
|---|---|
| Brand | DELPHI |
| MPN | bg2109 |
| Category | Brake rotor |
| Test Mark | E1 90R-02C0957/2559 |
| Height [mm] | 39 mm |
| Brake Disc Thickness [mm] | 20 mm |
| Minimum thickness [mm] | 18 mm |
| Outer Diameter [mm] | 239 mm |
| Centering Diameter [mm] | 65 mm |
OE/OEM numbers (6)
Search by this OE number to find compatible parts
- AUDI / SEAT / VW—321 615 301A
- AUDI / SEAT / VW—321 615 301B
- AUDI / SEAT / VW—321 615 301C
- AUDI / VW—6N0 615 301G
- AUDI / SEAT / VW—841 615 301
- VW—JZW615301K
Where this part fits
Original-fit position for OE 6N0615301G. The red ring marks where this part installs on the vehicle.
About this product
DELPHI brake disc (BG2109) is precision-machined from high-grade grey cast iron for uniform heat dissipation and resistance to thermal cracking under heavy braking. Key dimensional data — Test Mark: E1 90R-02C0957/2559, Height [mm]: 39 mm, Brake Disc Type: Carbon, Brake Disc Thickness [mm]: 20 mm — ensures the rotor geometry meets OEM tolerances for run-out, thickness, and parallelism right out of the box. Compatible with AUDI, SEAT, VW vehicles; the hub-centric bore and bolt-circle pattern match the original specification exactly. Direct replacement for OE references: 08557, 09.4765.10, 09.4765.14, 09.4765.75 and 105 more. DELPHI rotors are checked for surface hardness and dynamic balance before dispatch, keeping braking distances predictable throughout the service life of the disc. Brake discs generally last 50,000–70,000 miles, though this varies with driving habits, terrain, and pad compound — heavy urban driving or towing shortens disc life considerably. Warning signs of worn discs include visible scoring or lip formation on the friction surface, vibration through the steering wheel under braking, and a persistent grinding noise even with new pads fitted. Disc replacement is an intermediate DIY task; you will need a torque wrench, a breaker bar (some hub-to-disc retaining screws seize over time), and a jack with axle stands — budget 1–2 hours per axle. When selecting brake discs, check that the disc type (vented or solid) matches the original, and look for a protective anti-corrosion coating on the hub and non-friction surfaces to prevent rust jacking. Always replace discs in pairs (both sides of the same axle) to maintain even braking balance, and bed in new discs with the manufacturer's recommended gentle-braking procedure for the first 200 miles. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
Brake rotor buying guide
Why replace this part?
Brake discs work together with brake pads to bring your vehicle to a stop. Over time, discs wear down, develop grooves, or can warp from heat. Worn or warped discs reduce braking efficiency and can cause dangerous vibrations at speed.
Signs you need a replacement
- Pulsating brake pedal
- visible grooves or scoring on the disc surface
- vibration during braking
- grinding noise even with new pads
- disc thickness below minimum specification
When to replace
Every 50,000–80,000 miles. Always measure disc thickness during pad changes — most discs have a minimum thickness stamped on the hub.
About DELPHI
Delphi Technologies, with roots dating back to 1994 as part of General Motors, is a globally recognised supplier of fuel injection, ignition, and engine management systems. Delphi specialises in diesel injectors, fuel pumps, ignition coils, lambda sensors, and engine management components. As an OE supplier to major manufacturers worldwide, Delphi products are engineered to original factory specifications. With deep expertise in both petrol and diesel fuel systems, Delphi is the professional's choice for precision engine and fuel system components.
Suitable cars
Equivalent products (105)
Show all 105 OE numbers
Brake rotor DELPHI BG2109 — compatible car models
| Car models | AUDI: 80 B1 Saloon (80, 82), 80 B2 Saloon (811, 813, 814, 819, 853), 90 B2 (813, 814, 853), COUPE B2 (81, 855, 856); SEAT: CORDOBA (6K1, 6K2), CORDOBA Vario (6K5), IBIZA II (6K1), INCA (6K9), TOLEDO I (1L2); VW: CADDY Box Body/MPV (6K9, 9E7, 9E9), CADDY II Box Body/MPV (9K9A), GOLF I (17), GOLF I Cabriolet (155), GOLF II (19E, 1G1), GOLF III (1H1), GOLF III Cabriolet (1E7), GOLF III Van (1H1), GOLF III Variant (1H5), GOL G2 (+11 more) |
|---|---|
| Engines | 1.6; 2.0; 1.8 GT; 1.0; 1.4 16V; 1.0 16V; 1.6 i; 1.8; 1.4; 1.9 SDI; 1.0 Flex |
| Year of manufacture | 1972-2014 |
| Manufacturer article number (MPN) | BG2109 |
| OE part numbers | 321 615 301A, 321 615 301B, 321 615 301C, 6N0 615 301G, 841 615 301, JZW615301K |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
DELPHI bg2109 Brake rotor. Brake Disc Thickness [mm]: 20 mm. Brake Disc Type: 8. Centering Diameter [mm]: 65 mm. Height [mm]: 39 mm. Minimum thickness [mm]: 18 mm. Number of Holes: 4. Outer Diameter [mm]: 239 mm. Surface: 56
- 1x Brake disc
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Brake rotor compatible with my car?
This Brake rotor fits AUDI, SEAT, VW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this DELPHI Brake rotor have?
This DELPHI Brake rotor has the following specifications: Test Mark: E1 90R-02C0957/2559; Height [mm]: 39 mm; Brake Disc Type: 8; Brake Disc Thickness [mm]: 20 mm; Minimum thickness [mm]: 18 mm; Outer Diameter [mm]: 239 mm. Check the full specifications table above for complete details.
What OE part numbers does this Brake rotor replace?
This Brake rotor replaces OE part numbers: 321 615 301A, 321 615 301B, 321 615 301C, 6N0 615 301G, 841 615 301, JZW615301K. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Brake rotor cost?
This DELPHI Brake rotor is available for £22.99. Brake rotor prices vary depending on brand, specifications, and vehicle compatibility. DELPHI parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Brake rotor?
Watch for pulsating brake pedal, visible grooves or scoring on the disc surface, vibration during braking, or a grinding noise. Brake discs typically last 50,000-80,000 miles but should be measured for minimum thickness during pad changes.
What tools do I need to replace a Brake rotor?
Tools needed: floor jack and axle stands, lug wrench, 7mm hex / Torx caliper bolt socket, pry bar or disc puller, wire brush, brake cleaner, copper grease, torque wrench (wheel bolts to manufacturer spec). Difficulty: Moderate DIY. Safety warning: Do not drive the vehicle until both discs on the same axle are replaced and the brakes have been bedded in. Brake dust may contain harmful particles -- wear a dust mask.
Can I use this part as a replacement for OE 321 615 301A?
Yes, this DELPHI Brake rotor is a direct replacement for OE part number 321 615 301A. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
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