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Ski-Doo OEM Part 518331731 RH Under Chassis Reinforcement
- Product Code: 518331731
$18.43
- Genuine Ski-Doo OEM part
- New in original packaging
- Fits the models listed in the fitment chart
- Easy, no-hassle returns
This product is vehicle specific.
Find your vehicle to make sure this part fits before you order.
Ships in 4 to 9 days
Genuine Ski-Doo OEM Right Under Chassis Reinforcement (part number 518331731) from the Frame - System - Front Section diagram. It fits Ski-Doo Aapa-Aapb and Ajpa built from 2020 to 2026.
Fits these models
- Aapa-Aapb: 2020–2026
- Ajpa: 2021–2026
See the Fitment tab for the full list with model codes.
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Year, make and model of your machine- VIN or frame / serial number
- OEM part number or a photo of the old part
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(630) 886-1221Find your ride
Check your current ride below to confirm product compatibility.
Ski-Doo
2026
- EXPEDITION - LE - 600R E-TEC - ABTA - Deep Black - 20X154X1.5CSS Track
- EXPEDITION - LE - 900 ACE - AATB - Deep Black - 20X154X1.5CSS Track
- SKANDIC - LE - 600 ACE - AKTA - Deep Black - 20X154X1.5CST Track
- SKANDIC - LE - 600 EFI - ATTB - Deep Black - 20X154X1.5CST Track
- SKANDIC - SPORT - 600 EFI - AJTA - Neo Yellow - 20X154X1.25WT Track
- Europe - EXPEDITION - XTREM - 850 E-TEC - ADTC - Scandi Blue - 20X154X1.8CST8 Track
- Europe - EXPEDITION - LE - 900 ACE - AATD - Deep Black - 20X154X1.5CSS Track
- Europe - SKANDIC - SPORT - 600 EFI - AJTB - Neo Yellow - 20X154X1.25WT Track
- Europe - SKANDIC - LE - 900 ACE - AHTD - Deep Black - 20X154X1.5CST Track
2025
- EXPEDITION - 600R E -TEC - LE - ABSB - Deep Black - 154X20X1.5CST Track
- EXPEDITION - 900 ACE - LE - AASB - Deep Black - 154X20X1.5CST Track
- SKANDIC - 600 ACE - LE - AKSA - Deep Black - 154X20X1.5CST Track
- SKANDIC - 600 EFI - LE - ATSA - Catalyst Gray - 154X20X1.5CST Track
- SKANDIC - 600 EFI - SPORT - AJSA - Neo Yellow - 154X20X1.25WT Track
- Europe - EXPEDITION - 850 E-TEC - Xtreme - ADSA - Flare Yellow HG - 154X20X1.8CST8 Track
- Europe - EXPEDITION - 900 ACE - LE - AASA - Deep Black - 154X20X1.5CST Track
- Europe - SKANDIC - 600 EFI - SPORT - AJSB - Neo Yellow - 154X20X1.25WT Track
- Europe - SKANDIC - 900 ACE - LE - AHSE - Deep Black - 154X20X1.5CST Track
2024
- EXPEDITION 600R E-TEC - LE - ABRA - Deep Black - 154X20X1.5CST Track
- EXPEDITION 900 ACE - LE - AARA - Deep Black - 154X20X1.5CST Track
- EXPEDITION 900 ACE - LE - AARD - Deep Black - 154X20X1.5CST Track
- SKANDIC 600 ACE - LE - AKRA - Deep Black - 154X20X1.5CST Track
- SKANDIC 600 EFI - LE - ATRB - Northern Lichen - 154X20X1.5CST Track
- SKANDIC 600 EFI - LE - ATRC - Deep Black - 154X20X1.5CST Track
- SKANDIC 600 EFI - SPORT - AJRA - Neo Yellow - 154X20X1.25WT Track
- SKANDIC 900 ACE - LE - AHRD - Deep Black - 154X20X1.5CST Track
- Europe - EXPEDITION 850 E-TEC - Xtreme - ADRC - Neo Mint - 154X20X1.8CST8 Track
- Europe - SKANDIC 600 EFI - SPORT - AJRB - Neo Yellow - 154X20X1.25WT Track
2023
- EXPEDITION LE 600R E-TEC - 20 INCH
- EXPEDITION LE 900 ACE - 20 INCH - (AAPA-AAPB)
- EXPEDITION LE 900 ACE - 20 INCH - (AAPD-E-F)
- EXPEDITION XTREME 850 E-TEC - (ADPD-ADPE)
- SKANDIC SPORT 600 EFI - (AJPA)
- SKANDIC SPORT 600 EFI - (AJPC-AJPD)
- SKANDIC LE 600 EFI
- SKANDIC LE 600 ACE
- SKANDIC LE 900 ACE - 20 INCH - (AHPK)
- SKANDIC LE 900 ACE - Europe
2022
- EXPEDITION LE 600R E-TEC
- EXPEDITION LE 900 ACE
- EXPEDITION SE 600R E-TEC
- EXPEDITION SE 900 ACE
- EXPEDITION XTREME 850 E-TEC
- SKANDIC SPORT 600 EFI
- SKANDIC WT 600 EFI
- SKANDIC WT 600 ACE
- SKANDIC WT 900 ACE
- EXPEDITION LE 900 ACE, Europe
- EXPEDITION SE 900 ACE TURBO, Europe
- EXPEDITION XTREME 850 E-TEC, Europe
- SKANDIC SPORT 600 EFI - Europe
- SKANDIC WT 900 ACE - Europe
2021
- EXPEDITION LE 600R E-TEC
- EXPEDITION LE 900 ACE
- EXPEDITION SE 600R E-TEC
- EXPEDITION SE 900 ACE
- EXPEDITION XTREME 850 E-TEC
- SKANDIC SPORT 600 EFI
- SKANDIC WT 600 EFI
- SKANDIC WT 600 ACE
- EXPEDITION LE 900 ACE, Europe
- EXPEDITION SE 900 ACE Turbo, Europe
- EXPEDITION XTREME 850 E-TEC, Europe
- SKANDIC SPORT 600 EFI - Europe
- SKANDIC WT 900 ACE - Europe
- Ski-Doo EXPEDITION - LE - 600R E-TEC - ABTA - Deep Black - 20X154X1.5CSS Track, 2026 Frame - System - Front Section
- Ski-Doo EXPEDITION - LE - 900 ACE - AATB - Deep Black - 20X154X1.5CSS Track, 2026 Frame - System - Front Section
- Ski-Doo SKANDIC - LE - 600 ACE - AKTA - Deep Black - 20X154X1.5CST Track, 2026 Frame - System - Front Section
- Ski-Doo SKANDIC - LE - 600 EFI - ATTB - Deep Black - 20X154X1.5CST Track, 2026 Frame - System - Front Section
- Ski-Doo SKANDIC - SPORT - 600 EFI - AJTA - Neo Yellow - 20X154X1.25WT Track, 2026 Frame - System - Front Section
- Ski-Doo Europe - EXPEDITION - XTREM - 850 E-TEC - ADTC - Scandi Blue - 20X154X1.8CST8 Track, 2026 Frame - System - Front Section
- Ski-Doo Europe - EXPEDITION - LE - 900 ACE - AATD - Deep Black - 20X154X1.5CSS Track, 2026 Frame - System - Front Section
- Ski-Doo Europe - SKANDIC - SPORT - 600 EFI - AJTB - Neo Yellow - 20X154X1.25WT Track, 2026 Frame - System - Front Section
- Ski-Doo Europe - SKANDIC - LE - 900 ACE - AHTD - Deep Black - 20X154X1.5CST Track, 2026 Frame - System - Front Section
- Ski-Doo EXPEDITION - 600R E -TEC - LE - ABSB - Deep Black - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo EXPEDITION - 900 ACE - LE - AASB - Deep Black - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo SKANDIC - 600 ACE - LE - AKSA - Deep Black - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo SKANDIC - 600 EFI - LE - ATSA - Catalyst Gray - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo SKANDIC - 600 EFI - SPORT - AJSA - Neo Yellow - 154X20X1.25WT Track - 2025 Frame - System - Front Section
- Ski-Doo Europe - EXPEDITION - 850 E-TEC - Xtreme - ADSA - Flare Yellow HG - 154X20X1.8CST8 Track - 2025 Frame - System - Front Section
- Ski-Doo Europe - EXPEDITION - 900 ACE - LE - AASA - Deep Black - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo Europe - SKANDIC - 600 EFI - SPORT - AJSB - Neo Yellow - 154X20X1.25WT Track - 2025 Frame - System - Front Section
- Ski-Doo Europe - SKANDIC - 900 ACE - LE - AHSE - Deep Black - 154X20X1.5CST Track - 2025 Frame - System - Front Section
- Ski-Doo EXPEDITION 600R E-TEC - LE - ABRA - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo EXPEDITION 900 ACE - LE - AARA - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo EXPEDITION 900 ACE - LE - AARD - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo SKANDIC 600 ACE - LE - AKRA - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo SKANDIC 600 EFI - LE - ATRB - Northern Lichen - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo SKANDIC 600 EFI - LE - ATRC - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo SKANDIC 600 EFI - SPORT - AJRA - Neo Yellow - 154X20X1.25WT Track, 2024 Frame - System - Front Section
- Ski-Doo SKANDIC 900 ACE - LE - AHRD - Deep Black - 154X20X1.5CST Track, 2024 Frame - System - Front Section
- Ski-Doo Europe - EXPEDITION 850 E-TEC - Xtreme - ADRC - Neo Mint - 154X20X1.8CST8 Track, 2024 Frame - System - Front Section
- Ski-Doo Europe - SKANDIC 600 EFI - SPORT - AJRB - Neo Yellow - 154X20X1.25WT Track, 2024 Frame - System - Front Section
- Ski-Doo EXPEDITION LE 600R E-TEC - 20 INCH - 2023 Frame - System - Front Section
- Ski-Doo EXPEDITION LE 900 ACE - 20 INCH - (AAPA-AAPB) - 2023 Frame - System - Front Section
- Ski-Doo EXPEDITION LE 900 ACE - 20 INCH - (AAPD-E-F) - 2023 Frame - System - Front Section
- Ski-Doo EXPEDITION XTREME 850 E-TEC - (ADPD-ADPE) - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC SPORT 600 EFI - (AJPA) - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC SPORT 600 EFI - (AJPC-AJPD) - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC LE 600 EFI - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC LE 600 ACE - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC LE 900 ACE - 20 INCH - (AHPK) - 2023 Frame - System - Front Section
- Ski-Doo SKANDIC LE 900 ACE - Europe, 2023 Frame - System - Front Section
- Ski-Doo EXPEDITION LE 600R E-TEC - 2022 Frame - System
- Ski-Doo EXPEDITION LE 900 ACE - 2022 Frame - System
- Ski-Doo EXPEDITION LE 900 ACE - 2022 Frame - System
- Ski-Doo EXPEDITION SE 600R E-TEC - 2022 Frame - System
- Ski-Doo EXPEDITION SE 900 ACE - 2022 Frame - System
- Ski-Doo EXPEDITION XTREME 850 E-TEC - 2022 Frame - System
- Ski-Doo SKANDIC SPORT 600 EFI - 2022 Frame - System
- Ski-Doo SKANDIC WT 600 EFI - 2022 Frame - System
- Ski-Doo SKANDIC WT 600 EFI - 2022 Frame - System
- Ski-Doo SKANDIC WT 600 ACE - 2022 Frame - System
- Ski-Doo SKANDIC WT 900 ACE - 2022 Frame - System
- Ski-Doo EXPEDITION LE 900 ACE, Europe, 2022 Frame - System
- Ski-Doo EXPEDITION SE 900 ACE TURBO, Europe, 2022 Frame - System
- Ski-Doo EXPEDITION XTREME 850 E-TEC, Europe, 2022 Frame - System
- Ski-Doo SKANDIC SPORT 600 EFI - Europe, 2022 Frame - System
- Ski-Doo SKANDIC WT 900 ACE - Europe, 2022 Frame - System
- Ski-Doo EXPEDITION LE 600R E-TEC - 2021 Frame - System - LE
- Ski-Doo EXPEDITION LE 900 ACE - 2021 Frame - System - LE
- Ski-Doo EXPEDITION SE 600R E-TEC - 2021 Frame - System - SE
- Ski-Doo EXPEDITION SE 900 ACE - 2021 Frame - System - SE
- Ski-Doo EXPEDITION XTREME 850 E-TEC - 2021 Frame - System - XTREM
- Ski-Doo SKANDIC SPORT 600 EFI - 2021 Frame - System - Sport
- Ski-Doo SKANDIC WT 600 EFI - 2021 Frame - System - WT
- Ski-Doo SKANDIC WT 600 ACE - 2021 Frame - System - WT
- Ski-Doo EXPEDITION LE 900 ACE, Europe, 2021 Frame - System - LE
- Ski-Doo EXPEDITION SE 900 ACE Turbo, Europe, 2021 Frame - System - SE
- Ski-Doo EXPEDITION XTREME 850 E-TEC, Europe, 2021 Frame - System - XTREM
- Ski-Doo SKANDIC SPORT 600 EFI - Europe, 2021 Frame - System - Sport
- Ski-Doo SKANDIC WT 900 ACE - Europe, 2021 Frame - System - WT
- Ski-Doo EXPEDITION LE/SE 600R E-TEC - 2020 Frame - System - LE - SE
- Ski-Doo EXPEDITION LE/SE 900 ACE - 2020 Frame - System - LE - SE
- Ski-Doo EXPEDITION XTREME 850 E-TEC - 2020 Frame - System - XTREME
- Ski-Doo EXPEDITION LE 900 ACE, Europe, 2020 Frame - System - LE
- Ski-Doo EXPEDITION LE/SE 900 ACE Turbo, Europe, 2020 Frame - System - LE
- Ski-Doo EXPEDITION LE/SE 900 ACE Turbo, Europe, 2020 Frame - System - SE
- Ski-Doo EXPEDITION XTREME 850 E-TEC, Europe, 2020 Frame - System - XTREME
Part Details
| Brand | Ski-Doo |
| Sku | 518331731 |
| Name | RH Under Chassis Reinforcement |
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