Why is my Audi Q5 leaking coolant from the water pump?

Short answer: Q5 2.0Ts often leak at the water pump or thermostat. Catch the drop early, ask about extended coverage, and pressure-test so you replace the part that is actually wet.

Symptom: Coolant level dropping, sweet smell, residue near the pump, low-coolant warning, or code P00B7.

What to check first

1. Check the coolant reservoir cold.
2. Look for pink/purple residue around the pump/thermostat.
3. Ask about any water-pump extended warranty or settlement for your VIN.
4. Pressure-test so you do not replace both parts blindly.

Likely causes

1. Water pump leak. Q5 2.0T water pumps commonly weep coolant. Owners see residue, smell coolant, or get a low-coolant warning well before 100k.
2. Thermostat housing leak. The thermostat and housing sit with the pump. Audi bulletins say pressure-test and replace only the leaking part—not always both.
3. Related coolant hoses. Brittle hoses in the same area can look like a pump leak. Inspect before you approve parts.

What it usually costs

Pump/thermostat jobs are mid-range repairs. Extended coverage or goodwill can zero the bill—check VIN.

Is it safe to keep driving?

Do not ignore a low tank. Overheating can warp the head.

DIY or shop?

Coolant checks DIY. Pump replacement is a shop job for most owners.

Recalls, bulletins and complaints in plain words

• Related recalls: NHTSA lists these recalls touching this area of the Audi Q5: 22V753000 (2021-2021 model years, engine and engine cooling:engine:hard parts internal/mechanical); 25V294000 (2022-2024 model years, engine). Check your VIN at nhtsa.gov/recalls. If your car is part of this recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect.
• NHTSA complaints: 47 keyword-matched complaints for Audi Q5 2018–2024 (of 421 unique complaints queried, NHTSA complaints API by model year, queried 2026-11-07; keywords: coolant, water pump, thermostat, leak) (NHTSA returned no data for 1 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In 18 Q5 Water Pump/Thermostat? on Reddit r/Audi, a 2018 Q5 owner asked about water pump/thermostat replacement.
• In 2018 Q5 Water Pump Extended Warranty on Reddit r/AudiQ5, owners discussed extended water-pump coverage.
• In Leaking Coolant on Reddit r/AudiQ5, an owner reported ongoing coolant loss.
• In 2018 Q5 2.0 intermittent coolant leak on Reddit r/AudiQ5, a 2018 2.0T owner chased an intermittent leak.

Quick tip

If your Q5 keeps losing coolant, open an Audi case and ask about water-pump coverage before you pay retail.

Vehicle focus: Audi Q5 2.0T roughly 2018-2024.

Safety / mechanic note

Overheating can strand you and damage the engine. Verify with a mechanic.