Introduction To 059919501A Coolant Temperature Sensor
について 059919501A is an standard 4-pin engine coolant temperature (ECT) sensor and dashboard gauge sender unit engineered.Serving as a direct aftermarket replacement for reference part numbers 059919501A, 059919501, そして 078919501C, this sensor features an updated green thermal-resistant housing with a 20mm clip-in mounting stem and a distinct rounded D-shaped 4-pin electrical socket.
It is widely installed across popular European platforms, including for VW Golf Mk4 / GTI (1999–2006 1.8T, 2.0L, 2.8L VR6, 1.9L TDI), for VW Jetta / Bora Mk4 (1999–2005), for VW Passat B5 / B5.5 (1998–2005 1.8T, 2.8L V6), for VW New Beetle (1998–2010), for VW Touareg, for Audi A3 (1999–2003), for Audi A4 / A4 Quattro B5 / B6 (1999–2006 1.8T, 2.8L, 3.0L), for Audi A6 / A6 Quattro C5 (1998–2004 2.7T, 2.8L, 3.0L), for Audi S4 / S6, for Audi TT / TT Quattro (2000–2006 1.8T, 3.2L VR6), for Seat Leon / Toledo / Ibiza, and for Skoda Octavia / Superb.
Houses dual independent Negative Temperature Coefficient (NTC) thermistors inside a high-conductivity, corrosion-resistant brass probe. Circuit 1 supplies real-time analog resistance data to the Engine Control Unit (ECU) for fuel injection pulse management, cold-start enrichment, ignition timing, and secondary radiator fan triggering. Circuit 2 independently drives the dashboard instrument temperature gauge. Each unit comes pre-packaged with a high-temperature sealing O-ring and retaining clip for a leak-free, direct plug-and-play installation.
対応車種および純正部品対応リスト
以下に、車両ごとの適用範囲の全一覧および互換性のある純正部品番号を、ご参照用に掲載します。.
| Vehicle Make | 車種 | モデル年 | Displacement |
|---|---|---|---|
| VW | Golf / Golf GTI | 1999–2006 | 1.8T / 2.0L / 2.8L VR6 / 1.9L TDI |
| VW | Jetta / Bora | 1999–2005 | 1.8T / 2.0L / 2.8L VR6 / 1.9L TDI |
| VW | Passat | 1998–2005 | 1.8T / 2.8L V6 / 2.0L TDI |
| VW | New Beetle | 1998–2010 | 1.8T / 2.0L / 1.9L TDI |
| VW | Touareg | 2004-2007 | 3.2L VR6 / 4.2L V8 |
| アウディ | A3 / S3 | 1999–2003 | 1.8T / 1.9L TDI |
| アウディ | A4 / A4 Quattro | 1999–2006 | 1.8T / 2.8L V6 / 3.0L V6 |
| アウディ | A6 / A6 Quattro | 1998–2004 | 2.7T / 2.8L V6 / 3.0L V6 |
| アウディ | Allroad Quattro | 2001–2005 | 2.7T / 4.2L V8 |
| アウディ | TT / TT Quattro | 2000–2006 | 1.8T (180/225 HP) / 3.2L VR6 |
| Seat | Leon / Toledo | AUQ, ARY, BAM, ASZ, ARL | Gas / Diesel |
| Seat | Ibiza / Cordoba | AYP, BJX, ASZ, BPX | Gas / Diesel |
| シュコダ | Octavia | AGU, ARX, AUQ, ALH, ASZ | Gas / Diesel |
| シュコダ | Superb | AWT, AMX, AWX, AVF | Gas / Diesel |
| OE Part Numbers | 059919501A / 059 919 501 A / 059919501 / 078919501C / 078 919 501 C | ||
Compliance Notice: All vehicle brand names, model designations, and engine codes listed below are referenced strictly to provide technical fitment and compatibility information.
卸売取引条件
最小発注数量（MOQ）
Our coolant temperature sensor 059919501A, standard minimum MOQ is 10 pieces per model. We also accept mixed orders of different sensor models to meet your diverse sourcing needs.
納期
For all in-stock coolant temperature sensor, we can arrange shipment within 3-7 business days. For large-volume wholesale orders, the production and delivery cycle is approximately 20 to 25 business days.
保証規定
Coolant temperature sensor 059919501A, come with a 12-month OE-quality warranty. If any manufacturing defect occurs within the warranty period, send us a video and we’ll offer a free return or exchange.
OEMおよびプライベートブランドサービス
当社のブランドパッケージは、各地域の市場のニーズに合わせて、サイズ、原材料、包装工程などをカスタマイズすることが可能です。さらに、世界中の卸売業者、販売代理店、大口購入者、商社に対し、柔軟かつ信頼性の高い生産パートナーシップを提供しています。 つまり、レーザー彫刻によるロゴ、カスタマイズされた製品ラベル、密封プラスチック袋、カラーボックスの印刷など、ワンストップのプライベートブランドサービスを提供しています。.
Professional Installation Guidelines
- Safety Preparation: Ensure the engine cooling system is completely cold. Slowly loosen the coolant expansion tank reservoir cap to release pressure, then retighten lightly.
- Locate the Sensor: On 1.8T and 2.0L engines, locate the 059919501A sensor mounted on the rear plastic coolant flange attached to the cylinder head; on 2.8L/2.7T V6 engines, locate it on the rear metal coolant cross-pipe.
- Disconnect Harness: Depress the retaining tab on the D-shaped 4-pin electrical plug and gently pull off the connector.
- Remove Retaining Clip: Place a catch pan beneath the engine bay to capture escaping coolant. Pull the plastic U-shaped retaining clip horizontally out of its flange groove.
- Extract Sensor & Old O-Ring: Pull the sensor straight out of the flange. Ensure the old black O-ring comes out; if stuck inside the flange bore, retrieve it with a soft pick.
- Install New Sensor with Lubricated O-Ring: Slide the provided new O-ring over the brass sensing tip of the 059919501A sensor. Lightly wet the O-ring with clean coolant and push the sensor firmly into the flange.
- Lock Clip & Reconnect: Slide the plastic retaining U-clip fully into its slot to lock the sensor flange. Plug in the D-shaped 4-pin wiring connector until it clicks. Refill the cooling system reservoir, bleed any trapped air, run the engine to operating temperature, and verify no leaks.
ヘルプセンター
よくあるご質問
Q1: Why are part numbers 059919501A and 078919501C interchangeable across for VW and for Audi?
A: Both numbers denote the identical 4-pin green D-shape sensor. 059919501A is the standard European parts reference, whereas 078919501C is a shared catalog interchange number. Both units use the exact same 20mm clip-in brass stem, electrical pinout, and resistance curves.
Q2: What fault codes and driving symptoms indicate a failing 059919501A sensor?
A: A failing sensor triggers diagnostic trouble codes P0115, P0116, P0117, P0118, P1256, あるいは P1281. Symptoms include hard cold starting, engine flooding with black smoke, erratic radiator fan operation, sudden drops on the dashboard temperature gauge, and decreased fuel mileage.
Q3: What precautions must be followed when replacing this clip-in coolant sensor?
A: Always perform installation on a fully cooled engine to prevent scalding. Remove the old rubber O-ring from the flange housing, lubricate the new O-ring with fresh coolant, push the brass probe firmly into the bore, and slide the plastic U-clip completely into its locking slot.
Q6: What wholesale order terms, MOQs, and warranty are provided for B2B importers?
A: We provide flexible wholesale MOQs starting from 10 units, custom private-label box packaging, and laser batch marking. Every unit undergoes automated thermal resistance calibration and is backed by a 12-month warranty.
