AUDI A4 B9 8W 2015-2019 REAR BOOT FUSE RELAY BOX BOARD CARRIER CUT WIRE
£24.45
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For faster fitment help, send your vehicle registration, VIN if available, and clear photos of your existing part, connector and part number.
AUDI A4 B9 8W 2015-2019 REAR BOOT FUSE RELAY BOX BOARD CARRIER CUT WIRE
£24.45
IMPORTANT FITMENT CORRECTION
Correct advertised year range: Audi A4 B9 / 8W 2015-2019, with the donor year confirmed as 2019. The original live title incorrectly states B8. Please note that 2015 is a crossover registration year: this will not fit an earlier A4 B8 / 8K simply because it is registered in 2015. Exact electrical compatibility still requires the carrier number, fuse and relay layout, connectors and wiring configuration to match.
THEPARTPILOT
ACTUAL ITEM — FRONT / FUSE LAYOUT
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THEPARTPILOT
ACTUAL ITEM — REAR / CUT WIRING TAILS
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What is included?
The used fuse and relay carrier, the fuses fitted in the photographed positions, two relays marked 645, connectors and the short cut wiring tails shown in the pictures. Nothing not photographed is included. This is not a complete uncut vehicle loom and should not be advertised as a plug-and-play complete wiring harness.
The used fuse and relay carrier, the fuses fitted in the photographed positions, two relays marked 645, connectors and the short cut wiring tails shown in the pictures. Nothing not photographed is included. This is not a complete uncut vehicle loom and should not be advertised as a plug-and-play complete wiring harness.
Verified Product Details
| Part type | Rear luggage-compartment fuse and relay carrier / fuse board / mounting panel |
| Advertised vehicle years | 2015-2019 Audi A4 B9 / 8W — late-2015 B9 vehicles onward; exact layout match required |
| Confirmed donor | Audi A4 B9 / 8W, model year 2019 |
| Fitting position | Rear boot / luggage-compartment fuse-carrier area behind the side trim; compare your original location and mounting points |
| Visible relay number | 645 |
| Visible relay part number | 4H0 951 253 A / 4H0951253A — this number identifies the visible relay, not the complete fuse carrier |
| Complete carrier MPN | Not readable in the supplied photographs. Do not enter or advertise a complete-carrier part number until it has been physically found on this item. The visible 4H0951253A number belongs to a relay, not the complete fuse box. |
| Materials | Moulded automotive plastic carrier, metal terminals, copper wiring, fuses and electromechanical relays |
| Condition | Used donor part with age-related marks. Wiring has been cut during removal. Study every actual-item photograph before ordering. |
Where It Fits in the Vehicle
THEPARTPILOT
ACTUAL DONOR LOCATION PHOTO — rear luggage area behind side trim
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B9 / 8W platform reference vehicle only. Exterior photo: EurovisionNim, Wikimedia Commons, CC BY-SA 4.0. The donor body style in this listing is not proven by the part photos.
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The carrier sits behind the boot side trim and provides a secure mounting and protected power-distribution point for rear electrical circuits. Depending on vehicle equipment, nearby fuse positions can serve items such as rear lighting, central locking, electric boot-lid systems, rear window heating, seat heating, amplifier, parking or camera equipment and other options. The carrier does not itself electronically control every circuit: it houses and connects the relevant fuses, relays and terminals. Fuse assignments vary by vehicle specification.
Exact Fitment — Read Before Ordering
Advertised years: 2015-2019 Audi A4 B9 / 8W. Confirmed donor year: 2019. The photographs confirm the rear boot fuse-bank assembly, two 645 relays, connectors and cut wiring arrangement. A matching year by itself is not enough; the complete layout and part number must also match.
The body style, engine, gearbox, drive type, trim and full option list are not visible. Because fuse populations and wiring can change with equipment, do not order only because your vehicle is an Audi A4 or because the year looks similar.
Compatibility Chart — Correct Years
Year range used for this listing: 2015-2019 Audi A4 B9 / 8W. The donor is confirmed as 2019. This is a populated electrical assembly, so model year alone does not guarantee fitment. Match the complete carrier number, fuse-bank layout, relay positions, connectors, terminal count and wiring configuration before purchase.
| Vehicle | Years | Fitment status |
|---|---|---|
| Audi A4 B9 / 8W | 2015 | Late-2015 B9 vehicles only. Does not fit the earlier B8 / 8K. Exact carrier and electrical layout must match. |
| Audi A4 B9 / 8W | 2016-2018 | Potential fit within the same B9 generation only when the original part number, fuse layout, relays and connectors match exactly. |
| Audi A4 B9 / 8W | 2019 | Donor year confirmed. Exact electrical configuration must still match your vehicle. |
| Audi A4 B9 facelift | 2020 onward | Not advertised as compatible without a confirmed identical complete-carrier part number and matching layout. |
| Audi A5 / S4 / S5 / RS5 and other models | Any year | Not claimed as compatible because the complete carrier MPN is not visible in the supplied photographs. |
For eBay vehicle compatibility, add only the exact vehicle variants verified by registration/VIN and the complete carrier part number. Do not copy the current 2023-2026 compatibility entries from the live listing.
This Part Will Not Fit
✘ Audi A4 B8 / 8K, including early-2015 B8 cars.
✘ Audi A4 2020 onward unless the complete carrier part number and every connector, relay and fuse position are independently verified as identical.
✘ Audi A5, S4, S5, RS5 or any other model solely because a similar empty carrier may be shared.
✘ Front, engine-bay, dashboard or footwell fuse-box applications.
✘ Any vehicle with a different carrier number or suffix, connector colour, terminal count, fuse-bank arrangement, relay layout or equipment specification.
✘ Vehicles that require an intact complete loom: the wiring tails on this item are cut.
How to Confirm Fitment First Time
1. Remove or expose your existing rear boot carrier and find its moulded or printed part number, including every final letter.
2. Match the three pink fuse-bank frames, empty positions, fuse ratings, both 645 relays, mounting points and beige connector.
3. Match connector shape, terminal count and wiring thickness. Do not match wires only by colour.
4. Confirm whether your repair needs only the carrier/fuses/relays or an intact loom. This item has cut wiring tails.
5. When unsure, send your registration or VIN, a clear photo of your old unit and its part number through eBay Messages before purchase. Fitment assistance reduces wrong orders but the final check remains the buyer's responsibility.
Possible Fault Symptoms
• Several unrelated rear electrical functions stop working or operate intermittently.
• Rear lights, boot-lid equipment, central locking, rear window heating, amplifier or optional equipment lose power.
• A relay clicks but the circuit receives no output, or a relay does not energise when commanded.
• Heat damage, melted plastic, loose terminals, green corrosion, moisture contamination or a burning smell is visible near the carrier.
• Fuses repeatedly fail because of a damaged terminal or an underlying short circuit.
Diagnosis warning: replacing a fuse carrier will not cure a shorted wire, failed control unit, water leak or overloaded circuit. Find and repair the root cause before fitting the replacement.
Fitting Guide, Tools & Estimated Time
Suggested tools
Plastic trim-removal tools; 10 mm socket and ratchet; suitable Torx bits commonly T20/T25/T30; fuse puller; multimeter or test lamp; terminal-release tools; wiring diagram; labels and camera; insulated gloves and eye protection.
Outline procedure
1. Switch the ignition off, remove the key and keep it away from the vehicle.
2. Follow the workshop manual to isolate the 12 V system. Disconnect the battery negative terminal only when safe to do so and observe any waiting period for restraint or pyrotechnic systems.
3. Remove the relevant boot-floor and side-trim panels without damaging clips, following the vehicle workshop manual.
4. Photograph, label and record every connector, fuse and relay position before disturbing the original carrier.
5. Compare part numbers and layouts. Transfer terminals or repair wiring only using the correct wiring diagram, terminal tools, joints and cable ratings.
6. Mount the replacement securely, refit the exact fuse ratings and reconnect each circuit. Never fit a higher-rated fuse to mask a fault.
7. Reconnect the battery, scan for stored faults and test every affected function before refitting all trim.
Electrical safety: because this item has cut heavy-current and signal wiring, installation may require terminal transfer, repinning or professional loom repair. A competent auto electrician is strongly recommended.
Estimated labour: approximately 0.8–1.5 hours for straightforward access and carrier transfer; approximately 1.5–3.0+ hours when wiring repair, repinning, fault tracing or coding checks are required. Times vary by vehicle, equipment and workshop.
Static Garage Labour Cost Calculator
No active content is used. Estimate labour with: hourly rate × estimated hours = labour cost. Figures below are labour only and exclude diagnostics, wiring materials, coding, VAT and additional repairs.
| Garage rate | 0.8 hour | 1.5 hours | 3.0 hours |
|---|---|---|---|
| £50/hour | £40 | £75 | £150 |
| £65/hour | £52 | £97.50 | £195 |
| £80/hour | £64 | £120 | £240 |
| £100/hour | £80 | £150 | £300 |
| £120/hour | £96 | £180 | £360 |
Why Choose a Used Factory Part?
✓ Original mounting geometry, terminal retention and fuse spacing are designed around the vehicle's electrical architecture.
✓ Factory connectors and housings generally reduce modification and fitment risk compared with an unsuitable universal copy.
✓ Reusing a serviceable part can offer a substantial saving against a new dealer-supplied component — potentially as much as 70% on some parts, depending on current new-part pricing and availability.
✓ Reuse keeps a functioning component in circulation, reduces demand for new raw materials and helps reduce automotive waste.
Saving percentages vary by part and market and are not guaranteed. Suitability depends on exact number and configuration, not brand name alone.
Workshop Fitting Service
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Professional fitting may be available subject to availability. Ask through eBay Messages before travelling or purchasing. Availability, diagnosis, labour time and price depend on the vehicle and repair required. The workshop image is licensed stock photography and is illustrative; it is not presented as a photograph of our premises. |
ThePartPilot Buyer Benefits
★ More than 25,000 parts in stock and on the shelf at any one time.
★ seller with 99%+ positive feedback.
★ Over 25 years of automotive-parts experience.
★ 30-day seller warranty on this item, matching the current live listing fields.
★ Tracked dispatch service; orders placed before 3pm are prioritised, subject to the service and handling time shown at checkout.
★ Fitting service subject to availability.
International Delivery, Address & VAT
International delivery: available to eligible destinations displayed by eBay at checkout through the Global Shipping Programme. Destination availability, import charges, restrictions and delivery service are controlled by eBay and can change; therefore a fixed country list is not stated here.
Checkout address: customers must ensure the delivery address is complete and correct before payment. The seller cannot change the address after checkout.
VAT: sold under the Global Accounting VAT Margin Scheme where applicable. VAT is not shown separately and is not reclaimable.
Returns & Condition Protection
Returns are handled under the return terms shown by eBay and applicable consumer law. Please complete all fitment checks before installation. Keep the item, fuses, relays, connectors and packaging in the condition received.
Any deduction from a refund will only be considered where eBay permits and where the returned item has suffered an actual loss in value caused by installation, alteration, damage, missing parts or inadequate return packaging. This is not a blanket restocking charge.
Stock, Packing & Dispatch
 Illustrative licensed stock image — organised warehouse inventory
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 Illustrative licensed stock image — boxed goods and dispatch preparation
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Every used part should be checked against the order, protected around vulnerable connectors and packed to reduce movement in transit. Stock photography is used only to illustrate the warehousing and dispatch process and is not represented as an image of our actual site.
♻️ SUPPORT A LOCAL SMALL BUSINESS
Buying a quality used component supports skilled local employment and keeps serviceable automotive parts in use. Reusing parts reduces waste, packaging demand and the raw materials and energy needed to manufacture a replacement. Thank you for choosing a more economical and environmentally responsible repair. 🔧📦🌍
WhatsApp QR for Fitment Help / Appointment Enquiries
Scan the QR code to contact ThePartPilot on WhatsApp for fitment checks, appointments or fitting service availability.For faster fitment help, send your vehicle registration, VIN if available, and clear photos of your existing part, connector and part number.
BUY THE CORRECT PART FIRST TIME
Match the carrier number, final suffix, fuse layout, relay positions, connectors and wiring configuration. When uncertain, contact ThePartPilot through eBay Messages with your registration or VIN and photographs of your original unit before ordering.
THEPARTPILOT
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