Audi · Known Issues

2018 Audi TTS Problems: 1 Known Issue

2018 model year · 114+ owner reports · Updated November 2026

According to Au7o's analysis of 114+ owner reports, the 2018 Audi TTS has 1 documented issue, with 1 rated critical. The most serious is Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI) ($500-$1,300 repair). The most commonly reported issue is Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI) with 114 owner reports. Across all issues with published estimates, repair costs range from $500 to $1,300. DIY maintenance guides at au7o.io.

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All 1 Known Issue

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Community reported

114 owners

On the 2016-2023 Audi TTS 2.0 TFSI EA888 Gen 3, on the TTS's 2.0 TFSI (EA888 Gen 3), coolant can leak from the water pump or from the thermostat housing. Owners usually notice the coolant level dropping or the low-coolant warning lamp coming on, and sometimes coolant under the car. Audi has issued two bulletins on these leaks. TSB 2052657/3 covers 2015-2019 EA888 Gen 3 engines, and TSB 2071515/1 covers the 2020-2023 TT and TTS 2.0L. Neither bulletin gives a root cause. Their main point is that the leak has to be traced to the exact part, because a low coolant level can also come from incomplete air bleeding at the factory or after an earlier repair.

This issue also affects: Volkswagen CC, Volkswagen Golf, Volkswagen GTI

Common Symptoms

Coolant level dropping or low-coolant warning lamp
Coolant leak or residue near the water pump/thermostat housing
Coolant puddle under the vehicle
Sweet smell from the engine bay
Engine temperature rising if coolant runs low

How to Fix

1. Check first: make sure coolant is really leaking. Audi notes that a low level can come from poor bleeding at the factory or after an earlier repair. TSB 2071515/1 tells technicians to photograph the leak, clean and dry the area completely, fill the coolant to max, and drive a few miles before checking again. If the leak does not come back, the bulletin says to keep watching and replace nothing. If it does come back, replace only the part that is leaking. 2. Pump or housing: TSB 2052657/3 (2015-2019 EA888 Gen 3) says to replace the water pump only when coolant leaks from its control/weep hole. It also says not to replace the pump and the thermostat housing at the same time unless photos of both leaks are attached to the repair order. Whichever part is replaced, its seal must be replaced too. The bulletin also notes that Audi now sells the water pump seals on their own. Before, they came only with the pump. 3. Coverage: for 2020-2023 TT/TTS, TSB 2071515/1 lists warranty claims up to 48 months/50,000 miles, plus Audi Certified Pre-Owned coverage. For a car outside any warranty, the bulletin is informational only. TSB 2052657/3 says it is informational only and does not apply to any Audi warranty. Neither bulletin is a recall. If your car is within 4 years/50,000 miles, ask the dealer to diagnose the leak under warranty.

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Typical repair cost:$500 - $1,300

Research This Issue

Based on 114 owner reports

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Community Reported

High Confidence114 owner reportsLast reported by owners Mar 2026Updated Nov 7, 2026

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Frequently Asked Questions

What are the most common Audi TTS problems?

According to Au7o's analysis of 114+ owner reports, the 2018 Audi TTS has 1 documented issue. The documented issue is: Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI). Of these, 1 is rated critical and should be addressed promptly.

Is the Audi TTS reliable?

The 2018 Audi TTS has 1 known issue documented across 114+ owner reports. 1 issue is rated critical: Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Audi TTS problems?

Repair costs for known Audi TTS issues range from $500 to $1,300, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI), typically costs $500-$1,300 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2016-2023 Audi TTS Coolant Leak from Water Pump or Thermostat Housing (2.0 TFSI)?

On the TTS's 2.0 TFSI (EA888 Gen 3), coolant can leak from the water pump or from the thermostat housing. Owners usually notice the coolant level dropping or the low-coolant warning lamp coming on, and sometimes coolant under the car. Audi has issued two bulletins on these leaks. Repairs typically run $500-$1,300. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.