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Genuine Audi Fuse Box

Fuse Holder Box
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66 Fuse Boxes found

  • Audi Fuse Box - 4F1-937-503-A
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    Audi Relay & Fuse Plate Part Number: 4F1-937-503-A

    $15.49 MSRP: $24.78
    You Save: $9.29 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • A6 | 2006-2011 | Base | 6 Cyl 3.2 L GAS
    • A6 Quattro | 2005-2011 | Avant, Base | 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS, 8 Cyl 4.2 L GAS
    • Q5 | 2009-2017 | Premium, Premium Plus, Prestige, TDI Premium Plus, TDI Premium Plus S-Line, TDI Prestige, TDI Prestige S-Line | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS
    • S6 | 2007-2011 | Base | 10 Cyl 5.2 L GAS
    • SQ5 | 2014-2017 | Premium Plus, Prestige | 6 Cyl 3.0 L GAS
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  • Audi Fuse Box - 8E0-937-503
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    Audi Relay & Fuse Plate Part Number: 8E0-937-503

    $15.31 MSRP: $24.50
    You Save: $9.19 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • A4 | 2007-2009, 2002-2005 | Base, Cabriolet | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS
    • A4 Quattro | 2007-2009, 2002-2005 | Avant, Base, Cabriolet | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS
    • RS4 | 2008 | Cabriolet | 8 Cyl 4.2 L GAS
    • S4 | 2007-2009, 2004-2005 | Avant, Base, Cabriolet | 8 Cyl 4.2 L GAS
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  • Audi Fuse Box - 5Q0-941-824
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    Audi Fuse Holder Part Number: 5Q0-941-824

    $17.99 MSRP: $28.78
    You Save: $10.79 (38%)
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    Product Specifications
    • Other Name: Holder; Fuse Box
    Fits the following Audi Models:
    • A3 | 2015-2020 | Premium, Premium Plus, Prestige, TDI Premium, TDI Premium Plus, TDI Prestige, Titanium | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
    • A3 Quattro | 2015-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • A3 Sportback e-tron | 2016-2018 | Premium, Premium Plus, Prestige | 4 Cyl 1.4 L PLUG-IN HYBRID EV-GAS (PHEV)
    • Q3 | 2019-2024 | Premium, Premium Plus, Prestige, S-Line Premium, S-Line Premium Plus, S-Line Prestige | 4 Cyl 2.0 L GAS
    • S3 | 2015-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • TT Quattro | 2016-2023 | Base | 4 Cyl 2.0 L GAS
    • TT RS Quattro | 2018-2022 | Base, Heritage Edition | 5 Cyl 2.5 L GAS
    • TTS Quattro | 2016-2023 | Base | 4 Cyl 2.0 L GAS
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  • Audi Fuse Box - 8K1-937-503-B
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    Audi Relay & Fuse Plate Part Number: 8K1-937-503-B

    $23.99 MSRP: $38.38
    You Save: $14.39 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • A4 | 2013-2016 | Base, Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • A4 Quattro | 2013-2016 | Base, Premium, Premium Plus, Prestige | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS
    • Q5 | 2009-2017 | Premium, Premium Plus, Prestige, TDI Premium Plus, TDI Premium Plus S-Line, TDI Prestige, TDI Prestige S-Line | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS
    • RS5 | 2013-2015 | Base, Cabriolet | 8 Cyl 4.2 L GAS
    • S4 | 2013-2016 | Base, Premium Plus, Prestige | 6 Cyl 3.0 L GAS
    • SQ5 | 2014-2017 | Premium Plus, Prestige | 6 Cyl 3.0 L GAS
    • allroad | 2013-2016 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L FLEX
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  • Audi Fuse Box - 8K0-941-824-D
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    Audi Fuse Holder Part Number: 8K0-941-824-D

    $30.00 MSRP: $48.00
    You Save: $18.00 (38%)
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    Product Specifications
    • Other Name: Holder; Fuse Box, Fuse Holder
    Fits the following Audi Models:
    • A3 | 2015-2020 | Premium, Premium Plus, Prestige, TDI Premium, TDI Premium Plus, TDI Prestige, Titanium | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
    • A3 Quattro | 2015-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • A3 Sportback e-tron | 2016-2018 | Premium, Premium Plus, Prestige | 4 Cyl 1.4 L PLUG-IN HYBRID EV-GAS (PHEV)
    • A4 | 2017-2020 | Premium, Premium Plus, Prestige, Titanium | 4 Cyl 2.0 L GAS
    • A4 Quattro | 2017-2023 | Premium, Premium Plus, Prestige, Ultra sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
    • A4 allroad | 2017-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
    • A5 | 2010-2014 | Cabriolet | 4 Cyl 2.0 L GAS
    • A5 Quattro | 2010-2023 | Base, Cabriolet, Premium, Premium Plus, Prestige, Sport | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.2 L GAS
    • A5 Sportback | 2018-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
    • A6 Quattro | 2019-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
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  • Audi Fuse Box - 8J0-937-503
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    Audi Relay & Fuse Plate Part Number: 8J0-937-503

    $29.61 MSRP: $47.38
    You Save: $17.77 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • TT | 2008-2009 | Base | 4 Cyl 2.0 L GAS
    • TT Quattro | 2008-2015 | Base, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 6 Cyl 3.2 L GAS
    • TT RS Quattro | 2012-2013 | Base | 5 Cyl 2.5 L GAS
    • TTS Quattro | 2009-2015 | Base | 4 Cyl 2.0 L GAS
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  • Audi Fuse Box - 4B3-937-505-A
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    Audi Fuse Box Part Number: 4B3-937-505-A

    $30.63 MSRP: $49.00
    You Save: $18.37 (38%)
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    Fits the following Audi Models:
    • Allroad Quattro | 2001-2005 | Base | 6 Cyl 2.7 L GAS, 8 Cyl 4.2 L GAS
  • Audi Fuse Box - 4K0-941-828-F
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    Audi Fuse Box Part Number: 4K0-941-828-F

    $93.64 MSRP: $131.15
    You Save: $37.51 (29%)
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    Fits the following Audi Models:
    • RS6 Avant | 2021-2023 | Base | 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
  • Audi Fuse Box - 8K1-937-503-C
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    Audi Relay & Fuse Plate Part Number: 8K1-937-503-C

    $14.68 MSRP: $23.48
    You Save: $8.80 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • Q5 | 2009-2017 | Premium, Premium Plus, Prestige, TDI Premium Plus, TDI Premium Plus S-Line, TDI Prestige, TDI Prestige S-Line | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS
    • SQ5 | 2014-2017 | Premium Plus, Prestige | 6 Cyl 3.0 L GAS
  • Audi Fuse Box - 4H0-937-503
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    Audi Relay & Fuse Plate Part Number: 4H0-937-503

    $33.74 MSRP: $53.98
    You Save: $20.24 (38%)
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • A8 Quattro | 2011-2018 | Base, L, L Sport, L TDI, L W12 | 12 Cyl 6.3 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS, 8 Cyl 4.0 L GAS, 8 Cyl 4.2 L GAS
    • S8 | 2013-2018 | Base, Plus | 8 Cyl 4.0 L GAS
  • Audi Fuse Box - 4M0-941-824-AQ
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    Audi Fuse Box Part Number: 4M0-941-824-AQ

    $40.89 MSRP: $56.32
    You Save: $15.43 (28%)
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    Product Specifications
    • Replaces: 4M0-941-824-AB
    Fits the following Audi Models:
    • A8 Quattro | 2019-2023 | L, L Plug-In Hybrid | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV), 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
    • S8 | 2020-2023 | Base | 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
  • Audi Fuse Box - 8K1-937-503-A
    Diagram for Audi Fuse Box - 8K1-937-503-A
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    Audi Relay & Fuse Plate Part Number: 8K1-937-503-A

    $14.68 MSRP: $23.48
    You Save: $8.80 (38%)
    Ships in 1-2 Business Days
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    Product Specifications
    • Other Name: Plate; Relay Fuse Plate
    Fits the following Audi Models:
    • A5 | 2010-2014 | Cabriolet | 4 Cyl 2.0 L GAS
    • A5 Quattro | 2008-2017 | Base, Cabriolet, Premium, Premium Plus, Prestige, Sport | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 6 Cyl 3.2 L GAS
    • Q5 | 2009-2017 | Premium, Premium Plus, Prestige, TDI Premium Plus, TDI Premium Plus S-Line, TDI Prestige, TDI Prestige S-Line | 4 Cyl 2.0 L FLEX, 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS
    • RS5 | 2013-2015 | Base, Cabriolet | 8 Cyl 4.2 L GAS
    • S5 | 2008-2017 | Base, Cabriolet, Premium Plus, Prestige | 6 Cyl 3.0 L GAS, 8 Cyl 4.2 L GAS
    • SQ5 | 2014-2017 | Premium Plus, Prestige | 6 Cyl 3.0 L GAS
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  • Audi Fuse Box - 4KE-937-124
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    Audi Relay & Fuse Plate Part Number: 4KE-937-124

    $67.82 MSRP: $94.98
    You Save: $27.16 (29%)
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    Product Specifications
    • Other Name: E Box; Relay Fuse Plate
    Fits the following Audi Models:
    • Q8 e-tron | 2024 | Launch Edition, Premium, Premium Plus, Prestige | BATTERY EV (EV/BEV)
    • Q8 e-tron Sportback | 2024 | Launch Edition, Premium, Premium Plus, Prestige | BATTERY EV (EV/BEV)
    • e-tron Quattro | 2021-2023, 2019 | Chronos Edition, Premium, Premium Plus, Prestige | BATTERY EV (EV/BEV)
    • e-tron S | 2022-2023 | Premium Plus, Prestige | BATTERY EV (EV/BEV)
    • e-tron S Sportback | 2022-2023 | Premium Plus, Prestige | BATTERY EV (EV/BEV)
    • e-tron Sportback | 2020-2023 | Premium, Premium Plus, Prestige | BATTERY EV (EV/BEV)
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  • Audi Fuse Box - 4G0-971-845-A
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    Audi Fuse & Relay Box Part Number: 4G0-971-845-A

    $69.01 MSRP: $96.65
    You Save: $27.64 (29%)
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    Product Specifications
    • Other Name: Mounting; Fuse & Relay Box
    Fits the following Audi Models:
    • A6 | 2012-2018 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS
    • A6 Quattro | 2012-2018 | Competition, Premium, Premium Plus, Prestige, Sport, TDI Premium Plus, TDI Prestige | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS
    • A7 Quattro | 2012-2018 | Base, Competition, Premium Plus, Prestige, TDI Premium Plus, TDI Prestige | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.0 L GAS
    • RS7 | 2014-2018 | Base, Performance | 8 Cyl 4.0 L GAS
    • S6 | 2013-2018 | Base, Premium Plus, Prestige | 8 Cyl 4.0 L GAS
    • S7 | 2013-2018 | Base, Premium Plus, Prestige | 8 Cyl 4.0 L GAS
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  • Audi Fuse Box - 5Q0-937-615-C
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    Audi Relay & Fuse Plate Part Number: 5Q0-937-615-C

    $223.71 MSRP: $313.32
    You Save: $89.61 (29%)
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    Product Specifications
    • Other Name: Holder; Fuse Holder, Relay Fuse Plate
    Fits the following Audi Models:
    • A3 | 2015-2020 | Premium, Premium Plus, Prestige, TDI Premium, TDI Premium Plus, TDI Prestige, Titanium | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L DIESEL, 4 Cyl 2.0 L GAS
    • A3 Quattro | 2015-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • A3 Sportback e-tron | 2016-2018 | Premium, Premium Plus, Prestige | 4 Cyl 1.4 L PLUG-IN HYBRID EV-GAS (PHEV)
    • Q3 | 2019-2024 | Premium, Premium Plus, Prestige, S-Line Premium, S-Line Premium Plus, S-Line Prestige | 4 Cyl 2.0 L GAS
    • S3 | 2015-2020 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS
    • TT Quattro | 2016-2023 | Base | 4 Cyl 2.0 L GAS
    • TT RS Quattro | 2018-2022 | Base, Heritage Edition | 5 Cyl 2.5 L GAS
    • TTS Quattro | 2016-2023 | Base | 4 Cyl 2.0 L GAS
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  • Audi Fuse Box - 4M0-941-828-H
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    Audi Fuse Box Part Number: 4M0-941-828-H

    $65.91 MSRP: $92.32
    You Save: $26.41 (29%)
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    Fits the following Audi Models:
    • A8 Quattro | 2019-2023 | L, L Plug-In Hybrid | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L PLUG-IN HYBRID EV-GAS (PHEV), 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
    • S8 | 2020-2023 | Base | 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
  • Audi Fuse Box - 8W0-941-824-BA
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    Audi Fuse Box Part Number: 8W0-941-824-BA

    $72.58 MSRP: $101.65
    You Save: $29.07 (29%)
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    Fits the following Audi Models:
    • A6 Quattro | 2019-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
    • A6 allroad | 2020-2023 | Premium Plus, Prestige | 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
    • A7 Sportback | 2019-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
    • S6 | 2020-2023 | Premium, Premium Plus, Prestige | 6 Cyl 2.9 L MILD HYBRID EV-GAS (MHEV)
    • S7 Sportback | 2020-2023 | Premium, Premium Plus, Prestige | 6 Cyl 2.9 L MILD HYBRID EV-GAS (MHEV)
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  • Audi Fuse Box - 4N0-937-501
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    Audi Fuse Box Part Number: 4N0-937-501

    $72.58 MSRP: $101.66
    You Save: $29.08 (29%)
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    Product Specifications
    • Other Name: Holder; Fuse Box
    Fits the following Audi Models:
    • A6 Quattro | 2019-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
    • A7 Sportback | 2019-2023 | Premium, Premium Plus, Prestige | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L MILD HYBRID EV-GAS (MHEV)
    • RS7 Sportback | 2021-2023 | Base | 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
    • S6 | 2020-2023 | Premium, Premium Plus, Prestige | 6 Cyl 2.9 L MILD HYBRID EV-GAS (MHEV)
    • S7 Sportback | 2020-2023 | Premium, Premium Plus, Prestige | 6 Cyl 2.9 L MILD HYBRID EV-GAS (MHEV)
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  • Audi Fuse Box - 8W0-941-824-AK
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    Audi Fuse Box Part Number: 8W0-941-824-AK

    $80.67 MSRP: $112.99
    You Save: $32.32 (29%)
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    Fits the following Audi Models:
    • RS6 Avant | 2021-2023 | Base | 8 Cyl 4.0 L MILD HYBRID EV-GAS (MHEV)
  • Audi Fuse Box - 4E0-941-824-A
    Diagram for Audi Fuse Box - 4E0-941-824-A
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    Audi Fuse Box Part Number: 4E0-941-824-A

    $73.77 MSRP: $103.32
    You Save: $29.55 (29%)
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    Fits the following Audi Models:
    • A8 Quattro | 2004-2010 | Base, L | 12 Cyl 6.0 L GAS, 8 Cyl 4.2 L GAS
    • S8 | 2007-2009 | Base | 10 Cyl 5.2 L GAS
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Audi Fuse Box

The Audi Fuse Box is a very important part of your vehicle. Therefore, it has to be maintained in good condition to avoid performance issues and comfortable driving. And these regular checks and replacements will ultimately save you some big repair costs. It is better to choose OEM parts when it comes to the time for fixing them. Why? Because they fit perfectly well and ensure safety. For people who prefer doing their maintenance, the genuine Audi Fuse Box is quite perfect. At AudiPartsGiant.com, we specialize in genuine Audi Fuse Boxes only. Also, we offer an extensive online catalog with many categories, ample stock, and secure shopping. The Audi Fuse Box is shipped directly from authorized Audi dealers at competitive prices. So trust us, and we will give you nothing but superior service. Depend on us for all your genuine parts needs, and then we will keep your automobile moving smoothly.

Audi Fuse Box Parts and Q&A

  • Q: How do Fuse Box and Relay Boxes protect circuits from excessive current flow on Audi A3?
    A:
    Fuses are set up to interrupt a circuit once a specific current level is surpassed as a safety measure to prevent damage to components and wiring in case of too much current flow, which is normally as a result of a fault such as a short-circuit. The fusebox is on the drivers side of the facia; it is accessed by unclipping the fusebox cover when the driver has opened the door with the positions of the fuses indicated on the back of the cover. Enabling the removal of a fuse, it is necessary to switch off the circuit or ignition and then extract the fuse out of the terminals, a blown fuse will have a piece of wire or be melted. Never use a fuse of a different rating, but it is always possible to replace them with the right rating. The bottom has a stamped fuse rating which is colour-coded. When the fuse keeps blowing, locate the cause of the inconvenience and then install the same fuse once more, because in this case, short to earth caused by insulation defects is probable. To circuits which have only one fuse, isolate the fault by turning on the circuits until the fuse blows once more, and have spare fuses of the appropriate value in the car. Further fuses and relays can be found in the fusebox high up on the left of the engine compartment, which has an unclipped fuse holder cover. To replace a fusible link, remove the negative terminal of the battery, unscrew the retaining nuts, remove the blown link, replace it with a new one, reconnect the lead, make sure that the retaining nuts go into place, replace them and install them again and fix the battery. A relay is a switch, controlled by electricity, which may turn heavy current on and off remotely, may have many inputs to control it, may have timer facilities. Another connection is that most of the relays are in the relay plate behind the driver side facia, and the other relays in the engine compartment fusebox. To gain access to the relays one has to take the lower facia of the driver side panel away. When a circuit operated by a relay faults, use the system to see whether the relay clicks when energised, in this case the fault is in the components or wiring of the system. When the relay does not energise it is possible that it is not being powered or is faulty and this can be tested by replacing it with a known good unit. To remove a relay, make sure that the corresponding circuit is switched off then pull it out of the socket and squeeze it back. The hazard-warning switch is provided with a direction indicator/hazard flasser relay.
  • Q: How does the Fuse Box safeguard the electrical circuits and what steps should be taken when a fuse or circuit breaker fails on Audi A4?
    A:
    The electrical circuits of the vehicle are protected by a combination of fuses, circuit breakers and fusible links, main fuse/relay panel is situated in the engine compartment and the interior panel is situated in the passenger compartment. Fuses with different sizes are used; there are small, medium, and large-size fuses with the same design of the blade terminal; medium and large fuses can be removed by hand, but small ones should be pulled by hand using a pliers or fuse-puller tool made of plastic. Where an electrical component fails, it is important to check the fuse first, with a test light to check that power is present at the terminal tips, where no power is present, the fuse is blown, which can also visually be verified by observing the element between the terminal tips. Replacement fuses must be of the proper type as despite any physical similarity, replacement with a fuse of another rating is inadvisable because of the particular protection requirements of each circuit. When replacement fuse breaks immediately, because that underlying problem is usually a short circuit caused by broken wiring, the underlying problem should be fixed before more replacements. Other circuits have fusible links to protect them, which are meant to melt in excessive current flow, replacing a melted fusible link should be with another of the same specification, and troubling deficiencies of the circuit should be tracked down. Circuit breakers are designed to protect certain circuits (which can include power windows or heated seats) and may detect an overload and automatically reset after cutting power; and will provide a temporary fault clearing before re-energizing the circuit, it is important to note that the circuit does not restart after resetting, and close examination is required. To perform basic checks, the circuit breaker can be tilted slightly out of its socket to measure with a voltmeter to verify that there is battery voltage at both terminals, where no voltage is present, that the circuit breaker must be replaced, and that the circuit breaker may need to be reset by hand.

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