Description
Thermostat Housing for Audi A1 / VW Polo / SEAT Ibiza – 105813 / 100389
This thermostat housing listing includes two fitment-based options for the vehicle applications listed below. Option 105813 corresponds to OE 03C121111P. Option 100389 corresponds to OE 03C121111T. Confirm compatibility by matching the exact OE reference number first, then VIN and engine code where variants exist.
Key Details
- SKU
- 105813 / 100389
- Component
- Thermostat Housing
- OEM References
-
- 03C121111P (Audi / VW) – Option 105813 (80-110°C)
- 03C121111T (Audi / VW) – Option 100389 (80-120°C)
- Included
- Two selectable options: 105813 or 100389. Customer must choose the correct option.
- Specs
- 105813: Switch point from 80 °C; switch point to 110 °C. 100389: Switch point from 83 °C; switch point to 120 °C.
Available Options
| Option | OEM Reference | Switch Range | Main Use |
|---|---|---|---|
| 105813 | 03C121111P | 80 °C to 110 °C | Audi A1 1.4 TFSI and VW 1.4 TSI / TFSI applications |
| 100389 | 03C121111T | 83 °C to 120 °C | VW Polo / Polo Vivo / Jetta 1.6 and SEAT Ibiza 1.6 applications |
Option 105813 – OE 03C121111P
- Switch point: 80°C to 110°C
- Used on: Audi A1 1.4 TFSI
- Used on: VW 1.4 TSI / TFSI applications like Golf 6, Scirocco, Tiguan, Beetle, Jetta, Touran
- Common engine families in your list: CAVG, CTHG, CAVD, CTHD, CNWA, CTKA, BWK, CAVA, CTHA, CAVC, CTHC
Option 100389 – OE 03C121111T
- Switch point: 83°C to 120°C
- Used on: VW Polo / Polo Vivo / Jetta 1.6
- Used on: SEAT Ibiza 1.6
- Common engine families in your list: BTS, CFNA, CLRA, CDDA, CGGB, CLPA, CLPB, CLSA
Key Differences
- Different temperature range
- Different engine applications
- Different OE number
Selection Guidance
- Do not assume these two options are interchangeable, even if they look similar.
- The safest rule is to match by exact OE number first, then VIN and engine code.
- 03C121111P = 105813
- 03C121111T = 100389
Key Benefits
- Two fitment-based thermostat housing options are listed for customer selection
- OEM reference numbers are provided to support accurate part matching
- Switch point ranges are listed for both options
- Engine family groupings are included to help identify the correct option
OEM Reference Numbers
- Audi / VW: 03C121111P (Option 105813)
- Audi / VW: 03C121111T (Option 100389)
Product Specifications
| Specification | Value |
|---|---|
| Option 105813 | Thermostat Housing |
| Option 105813 OEM | 03C121111P |
| Option 105813 Switch point from [°C] | 80 °C |
| Option 105813 Switch point to [°C] | 110 °C |
| Option 100389 | Thermostat Housing |
| Option 100389 OEM | 03C121111T |
| Option 100389 Switch point from [°C] | 83 °C |
| Option 100389 Switch point to [°C] | 120 °C |
| Selection Note | Customer must choose the correct option by OE number, VIN, and engine code |
Vehicle Fitment
-
Option 105813 – OEM 03C121111P
- Audi A1 / S1 (8X1, 8XK) – 1.4 TFSI (CAVG|CTHG) – 136 kW / 185 HP, 2011 – 2019
- Audi A1 / S1 Sportback (8XA, 8XF) – 1.4 TFSI (CAVG|CTHG) – 136 kW / 185 HP, 2012 – 2019
- Volkswagen Beetle (5C1, 5C2) – 1.4 TSI (CAVD|CNWA|CTHD|CTKA) – 118 kW / 160 HP, 2011 – 2026
- Volkswagen EOS (1F7, 1F8) – 1.4 TSI (CAVD|CTHD) – 118 kW / 160 HP, 2007 – 2011
- Volkswagen Golf VI (5K1) – 1.4 TSI (CAVD|CNWA|CTHD) – 118 kW / 160 HP, 2008 – 2013
- Volkswagen Golf VI Cabriolet (517) – 1.4 TSI (CAVD|CNWA|CTHD|CTKA) – 118 kW / 160 HP, 2012 – 2017
- Volkswagen Golf VI Van (5K1) – 1.4 TSi (CAVD) – 118 kW / 160 HP, 2008 – 2012
- Volkswagen Jetta V (1K2) – 1.4 TSI (CAVD) – 118 kW / 160 HP, 2005 – 2011
- Volkswagen Jetta VI (162, 163, AV3, AV2) – 1.4 TSI (CAVD|CTHD) – 118 kW / 160 HP, 2010 – 2026
- Volkswagen Polo III (6R1, 6C1) – 1.4 GTI (CAVE|CTHE) – 132 kW / 180 HP, 2009 – 2018
- Volkswagen Scirocco III (137, 138) – 1.4 TSI (CAVD|CNWA|CTHD|CTKA) – 118 kW / 160 HP, 2009 – 2018
- Volkswagen Tiguan (5N_) – 1.4 TSI (BWK|CAVA|CTHA) – 110 kW / 150 HP, 2007 – 2018
- Volkswagen Tiguan (5N_) – 1.4 TSI (CAVD|CTHD) – 118 kW / 160 HP, 2007 – 2018
- Volkswagen Tiguan (5N_) – 1.4 TSI 4motion (BWK|CAVA|CTHA) – 110 kW / 150 HP, 2007 – 2018
- Volkswagen Tiguan (5N_) – 1.4 TSI 4motion (CAVD|CTHD) – 118 kW / 160 HP, 2007 – 2018
- Volkswagen Tiguan VAN (5N_) – 1.4 TSI (5N2) (CTHD) – 118 kW / 160 HP, 2007 – 2018
- Volkswagen Touran (1T3) – 1.4 TSI (CAVC|CTHC) – 103 kW / 140 HP, 2010 – 2016
- Volkswagen Touran Box Body/MPV (1T3) – 1.4 TSI (CAVC|CTHC) – 103 kW / 140 HP, 2010 – 2015
-
Option 100389 – OEM 03C121111T
- SEAT Ibiza IV (6J5, 6P1) – 1.6 (BTS) – 77 kW / 105 HP, 2008 – 2026
- SEAT Ibiza IV SC (6J1, 6P5) – 1.6 (BTS) – 77 kW / 105 HP, 2008 – 2015
- Volkswagen Jetta VI (162, 163, AV3, AV2) – 1.6 (CFNA|CLRA) – 77 kW / 105 HP, 2010 – 2026
- Volkswagen Polo II (9N_, 9A_) – 1.6 16V (BTS) – 77 kW / 105 HP, 2001 – 2010
- Volkswagen Polo III (6R1, 6C1) – 1.4 (6R1) (CDDA|CGGB|CLPA) – 63 kW / 85 HP, 2009 – 2018
- Volkswagen Polo III (6R1, 6C1) – 1.6 (CFNA|CLSA) – 77 kW / 105 HP, 2009 – 2018
- Volkswagen Polo III Saloon (602, 604, 612, 614) – 1.6 (CFNA) – 77 kW / 105 HP, 2011 – 2022
- Volkswagen Polo Vivo Hatchback (6R1, 6RS, 6RT) – 1.4 (CLPA) – 63 kW / 86 HP, 2018 – 2026
- Volkswagen Polo Vivo Hatchback (6R1, 6RS, 6RT) – 1.4 (CLPB) – 55 kW / 75 HP, 2018 – 2026
- Volkswagen Polo Vivo Hatchback (6R1, 6RS, 6RT) – 1.6 (CLSA) – 77 kW / 105 HP, 2018 – 2026
- Volkswagen Polo Vivo Hatchback (6S1, 6S3) – 1.4 (CLPA) – 63 kW / 86 HP, 2010 – 2019
- Volkswagen Polo Vivo Hatchback (6S1, 6S3) – 1.4 (CLPB) – 55 kW / 75 HP, 2010 – 2019
- Volkswagen Polo Vivo Hatchback (6S1, 6S3) – 1.6 16V (CLSA) – 77 kW / 105 HP, 2010 – 2019
- Volkswagen Polo Vivo Saloon (6S2, 6S4) – 1.4 (CLPA) – 63 kW / 86 HP, 2010 – 2019
- Volkswagen Polo Vivo Saloon (6S2, 6S4) – 1.4 (CLPB) – 55 kW / 75 HP, 2010 – 2019
- Volkswagen Polo Vivo Saloon (6S2, 6S4) – 1.6 (CLSA) – 77 kW / 105 HP, 2010 – 2019
Fitment Notes
- Always match by OEM reference number(s) and vehicle details before ordering.
- Confirm exact fitment using your VIN, engine code, or chassis number if multiple variants exist.
- Choose the correct option before purchase, as 105813 and 100389 are fitment-specific alternatives with different switch ranges.
- South Africa nationwide delivery available – contact us for fitment assistance.
Common Questions
How do I choose between 105813 and 100389?
Match by exact OE number first, then VIN and engine code. 03C121111P corresponds to 105813. 03C121111T corresponds to 100389.
What is the difference between the two thermostat housings?
The practical differences are the temperature range, the engine applications, and the OE number. Option 105813 is 80°C to 110°C. Option 100389 is 83°C to 120°C.
Can I assume they are interchangeable if they look similar?
No. Do not assume these two options are interchangeable. Match by exact OE number first, then VIN and engine code.
What is included in the listing?
This is a multi-option thermostat housing listing where the customer must choose the correct variant: 105813 or 100389.
Important: Product information, kit contents and compatibility are provided as a guide and may contain errors or omissions. Please verify that this part and any included components are correct for your vehicle before installation. For full details see our Website Disclaimer (Errors & Omissions).