United States
Target · Diagram
Find this reference above
Number 7 marks the part’s position in the exploded view.
Product overview
Genuine OEM Volkswagen Thermostat T-Piece, part number 4H0121089E. This component connects coolant hoses and regulates engine temperature by controlling coolant flow. It is located at position 7 in the diagram. The part measures 90mm in length, 80mm in width, and 40mm in height. Genuine OEM thermostat T-pieces ensure precise fitment and durability for optimal engine cooling system performance.
Catalogue entry: T-PIECE.
Technical details
- Category
- Engine Cooling
- Customs (HS) code
- 84099100
- Manufacturer
- Volkswagen
- Product Type
- Genuine new auto parts
- Shipping size (L × W × H)
- 9 × 8 × 4 cm
- Shipping weight
- 0.06 kg
Specifications
As recorded in the manufacturer’s parts catalogue for this part number.
Equipment codes
- 8Z4
- 8Z5
PR codes identify the factory option a part belongs to; your vehicle’s are listed on the data sticker in the boot well or service booklet.
Why buy from WW Spares?
- ✓ Genuine OEM inventory sourced directly from factory networks
- ✓ Fitment support from workshop-seasoned parts specialists
- ✓ Global logistics with customs-ready documentation
Need help confirming compatibility? Talk to a specialist
Parts diagram & fitment
9 vehiclesT-piece With Thermostat — locate 4H0121089E Volkswagen Thermostat T-Piece | Engine Cooling in the official exploded view and explore the surrounding assembly.
Parts in this assembly29
- 1Hose 2Q0121049AJ
- 1Hose 2Q0121049AG
- 1Hose 2Q0121049AH
- 2Coupl Piece 5N0122293B
- 3Spring 032121142
- 4Seal Ring N90316801
- 5Sender 05C919501
- 6Seal Ring N90765301
- 8Coupl Piece 5Q0122291BE
- 10Spring 1J0121142
- 12Junction 1K0121087B
- 13Bracket 5N0121093C
- 14Water Pipe 04C121064B
- 15Clamp N0206096
- 16Screw N10721401
- 17Water Pipe 04C121070B
- 18Bolt N10714801
- 20Hose 2Q0122073G
- 21Coupl Piece 5Q0122291AJ
- 22Tpiece 5Q0121087L
- 23Bracket 3C0121093D
- 25Bracket 5Q0121093ES
- 26Bolt N10653102
- 30Hose 2Q0122157K
- 31Coupl Piece 5Q0122291S
- 40Binder 4A0820199
- 60Clamp N90686701
- 61Clamp N90687001
- 63Clamp N90687201
Vehicle fitment table9
Europe (7)
| Vehicle | Years | Pos. | Qty | Remark | PR |
|---|---|---|---|---|---|
| Kamiq | 2019- | 7 | 1 | PR:TJ4+8Z4, | |
| Audi A1 sportback 1.0 | 2018- | 7 | 1 | 8Z4 | |
| Arona FR | 2017- | 7 | 1 | ||
| Ibiza FR | 2017- | 7 | 1 | ||
| Polo 1.0 BlueMotion | 2017-2024 | 7 | 1 | TJ4 | |
| Audi Q3 2.0 TDI | 2014-2019 | 6 | 1 | ||
| Tiguan 4Motion | 2011-2018 | 7 | 1 |
Other markets (2)
| Vehicle | Years | Pos. | Qty | Remark | PR |
|---|---|---|---|---|---|
| Audi Q3 quattro 2.0 | 2016-2019 | 6 | 1 | ||
| Tiguan | 2009-2019 | 7 | 1 |
Diagrams & fitment data powered by oemdiagrams.com
4H0121089E Volkswagen Thermostat T-Piece | Engine Cooling is fitted on: Kamiq 2019-; Audi A1 sportback 1.0 2018-; Arona FR 2017-; Ibiza FR 2017-; Polo 1.0 BlueMotion 2017-2024; Audi Q3 2.0 TDI 2014-2019; Tiguan 4Motion 2011-2018; Audi Q3 quattro 2.0 2016-2019; Tiguan 2009-2019.