What is the purpose and functionality of the front seat belt tensioner system on Audi A3?

Each model comes with a front seat belt tensioner system built into each inertia reel, the rear seat belt inertia reel with the tensioner system fitted are only available in certain models with others having standard inertia reels. This system aims at removing any slack in the seat belt within seconds in case of a sudden frontal impact, thus reducing the chances of injury of front seat occupants. The tensioner is activated due to an impact which is in the front and which is of a certain force and the other impacts such as those caused by a rear impact do not activate the system. The explosive gas at the tensioner mechanism ensures the seat belt is locked in place when activated and this way the occupant is held firmly in place in the seat. When activated, the seat belt is permanently locked, and the assembly will have to be replaced. An individual should be careful because of the possibility of personal injury in case the system is switched on accidentally during the maintenance of the vehicle, and it is highly recommendable to leave any task that involves the seat belt inertia reel to be carried out by Audi dealer.

What should be checked for damage and wear in seat belts, and How to verify the seat belt reminder light on Audi A4?

Check seat belts, buckles, latch plates and guide loops to look at obvious damage and signs of wear. Make sure that the bolts that hold the seat belt receptacle on the vehicle floor are tight. Test to ensure that there is a seat belt reminder light that goes on when the key is turned to run or start position.

Genuine Audi Seat Belt

Seat Safety Belt

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735 Seat Belts found

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Audi Center Seat Belt Part Number: 8D0-857-713-D-45E
$96.39 MSRP: $135.00
You Save: $38.61 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lap Belt
- Position: Right
Fits the following Audi Models:
- A4 | 2000-2001 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 2000-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Center Seat Belt Part Number: 8D0-857-713-D-6PT
$96.39 MSRP: $135.00
You Save: $38.61 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Right
Fits the following Audi Models:
- A4 | 2000-2001 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 2000-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Center Seat Belt Part Number: 8D0-857-713-D-Q44
$112.81 MSRP: $158.00
You Save: $45.19 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Right
Fits the following Audi Models:
- A4 | 2000-2001 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 2000-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Center Seat Belt Part Number: 8D0-857-713-D-V04
$112.81 MSRP: $158.00
You Save: $45.19 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Right
Fits the following Audi Models:
- A4 | 2000-2001 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 2000-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-C-Q44
$114.24 MSRP: $160.00
You Save: $45.76 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1997 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1997 | Base | 8 Cyl 4.2 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-C-U24
$114.24 MSRP: $160.00
You Save: $45.76 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1998-1999 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1998-1999 | Base | 8 Cyl 4.2 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-D-U24
$114.24 MSRP: $160.00
You Save: $45.76 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1998-1999 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1998-1999 | Base | 8 Cyl 4.2 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-C-V04
$132.09 MSRP: $185.00
You Save: $52.91 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1997 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1997 | Base | 8 Cyl 4.2 L GAS
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Audi Center Seat Belt Part Number: 8D0-857-703-B-45E
$142.80 MSRP: $200.00
You Save: $57.20 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Left
Fits the following Audi Models:
- A4 | 2000-2001 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 2000-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Lap & Shoulder Belt Part Number: 8D0-857-703-B-9SV
$142.80 MSRP: $200.00
You Save: $57.20 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt; Lap & Shoulder Belt
- Position: Center
Fits the following Audi Models:
- A4 | 1998-1999 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 1998-1999 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
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Audi Lap & Shoulder Belt Part Number: 4A5-857-709-J-V04
$143.51 MSRP: $201.00
You Save: $57.49 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Seat Belt; Lap & Shoulder Belt, Outer Belt Assembly
- Position: Rear
Fits the following Audi Models:
- 100 | 1992-1994 | Base, CS, S | 6 Cyl 2.8 L GAS
- A4 | 1996-1997 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 1996-1997 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A6 | 1995-1997 | Base | 6 Cyl 2.8 L GAS
- A6 Quattro | 1995-1997 | Base | 6 Cyl 2.8 L GAS
- S4 | 1992-1994 | Base | 5 Cyl 2.2 L GAS
- S6 | 1995 | Avant, Base | 5 Cyl 2.2 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-D-V04
$143.51 MSRP: $201.00
You Save: $57.49 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1998-1999 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1998-1999 | Base | 8 Cyl 4.2 L GAS
View related parts
Audi Center Seat Belt Part Number: 8D0-857-703-B-6PT
$143.51 MSRP: $201.00
You Save: $57.49 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Left
Fits the following Audi Models:
- A4 | 1998-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 1998-2001 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
View More
View related parts
Audi Center Seat Belt Part Number: 8D0-857-703-B-Q44
$143.51 MSRP: $201.00
You Save: $57.49 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Left
Fits the following Audi Models:
- A4 | 1998-2002 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS
- A4 Quattro | 1998-2002 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS
- S4 | 2000-2002 | Avant, Base | 6 Cyl 2.7 L GAS
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Audi Rear Belt Assembly Part Number: 4D0-857-703-D-F64
$149.44 MSRP: $209.30
You Save: $59.86 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Rear
Fits the following Audi Models:
- A8 | 1998-1999 | Base | 8 Cyl 3.7 L GAS
- A8 Quattro | 1998-1999 | Base | 8 Cyl 4.2 L GAS
View related parts
Audi Lap & Shoulder Belt Part Number: 4L0-857-811-A-TPT
$160.65 MSRP: $225.00
You Save: $64.35 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seat Belt; Lap & Shoulder Belt
Fits the following Audi Models:
- Q7 | 2007 | Base, Premium | 6 Cyl 3.6 L GAS, 8 Cyl 4.2 L GAS
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Audi Lap & Shoulder Belt Part Number: 4L0-857-811-A-TPU
$160.65 MSRP: $225.00
You Save: $64.35 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seat Belt; Lap & Shoulder Belt
Fits the following Audi Models:
- Q7 | 2007 | Base, Premium | 6 Cyl 3.6 L GAS, 8 Cyl 4.2 L GAS
View related parts
Audi Lap & Shoulder Belt Part Number: 4L0-857-811-A-V04
$160.65 MSRP: $225.00
You Save: $64.35 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Seat Belt; Lap & Shoulder Belt
Fits the following Audi Models:
- Q7 | 2007 | Base, Premium | 6 Cyl 3.6 L GAS, 8 Cyl 4.2 L GAS
View related parts
Audi Lap & Shoulder Belt Part Number: 8D0-857-703-B-5SH
$162.19 MSRP: $227.15
You Save: $64.96 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt; Lap & Shoulder Belt
- Position: Center
Fits the following Audi Models:
- A4 | 1998-1999 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 1998-1999 | Avant, Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
View related parts
Audi Center Seat Belt Part Number: 8D0-857-703-V04
$162.19 MSRP: $227.15
You Save: $64.96 (29%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lap Belt
- Position: Center
Fits the following Audi Models:
- A4 | 1996-1997 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS
- A4 Quattro | 1996-1997 | Base | 4 Cyl 1.8 L GAS, 6 Cyl 2.8 L GAS

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Audi Seat Belt

The Audi Seat Belt ensures protection to all passengers by tightening immediately in the event of a sudden stop, holding bodies inside the vehicle and also working in conjunction with airbags, thereby reducing the risk of injury. Audi started building cars in 1909 and from the beginning developed a reputation for combining sporty performance with quality German build. From the original water-cooled engines to today's Quattro all-wheel drive, Audi continues to perfect the way in which a car grips the road and accelerates with confidence. Virtual Cockpit digital gauges, matrix LED headlights and the growing e-tron electric range are just some of the ways the brand packs in cutting-edge tech into sedans and SUVs that remain fun to drive in all weather. With continued testing of self-driving systems, Audi is an indication of a future in which comfort and safety are advancing together. At the center of that safety foundation is the Seat Belt system that is applied throughout the lineup. Each Seat Belt is made of tough polyester webbing, an accurate buckle and an inertia reel which allows the belt to slide in calm cruising conditions but which locks the moment sensors detect rapid deceleration, securing occupants in the safe position inside every Audi model. The simple three-point layout goes across the front and rear seats so families, friends and solo drivers all get the same shield without having to do any special add-ons. Durable materials mean that a Seat Belt will last for years, and its lightweight design means that it does not add bulk, proving that a small strip of fabric can keep up with all the high tech around it in saving lives.

Stick with genuine OEM Seat Belt when you need quality that holds up. Audi crafts these parts to hit strict factory specs for every single unit. They also run each part through rigorous checks during production to maintain high quality. You can find exact Audi Seat Belt you need in our huge stock at AudiPartsGiant.com. You'll love our low, economical prices too. Every OEM part carries a real manufacturer's warranty, so you can buy with confidence. Returns aren't a headache here because our policy is simple. Plus, our speedy delivery gets orders out fast. Shop today and buy with total peace of mind.

Audi Seat Belt Parts and Q&A

Lap & Shoulder Belt
8P0-857-807-K-RMS
Q: What is the purpose and functionality of the front seat belt tensioner system on Audi A3?
A:
Each model comes with a front seat belt tensioner system built into each inertia reel, the rear seat belt inertia reel with the tensioner system fitted are only available in certain models with others having standard inertia reels. This system aims at removing any slack in the seat belt within seconds in case of a sudden frontal impact, thus reducing the chances of injury of front seat occupants. The tensioner is activated due to an impact which is in the front and which is of a certain force and the other impacts such as those caused by a rear impact do not activate the system. The explosive gas at the tensioner mechanism ensures the seat belt is locked in place when activated and this way the occupant is held firmly in place in the seat. When activated, the seat belt is permanently locked, and the assembly will have to be replaced. An individual should be careful because of the possibility of personal injury in case the system is switched on accidentally during the maintenance of the vehicle, and it is highly recommendable to leave any task that involves the seat belt inertia reel to be carried out by Audi dealer.
Center Seat Belt
8D0-857-703-B-Q44
Q: What should be checked for damage and wear in seat belts, and How to verify the seat belt reminder light on Audi A4?
A:
Check seat belts, buckles, latch plates and guide loops to look at obvious damage and signs of wear. Make sure that the bolts that hold the seat belt receptacle on the vehicle floor are tight. Test to ensure that there is a seat belt reminder light that goes on when the key is turned to run or start position.