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Audi SQ7 TDI quattro common faults.

2019–2024, SUV, diesel, 435 HP.

The fault list covers: CZAC engine, AL952 transmission.

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4 fault write-ups. 3 important. 10 recalls.

If you know the year, pick it. Faults for other years drop out of the list.

Before you buy

Known faults

3 important faults

expensive3

Air suspension: compressor, air spring, ride height sensor

expensive

The four groups of parts in the air suspension (compressor, valve block, ride height sensors, air springs) work together, and any weak link causes a fault message, an uneven ride height or a car that settles. The characteristic symptom: the car sits down on one corner overnight, levels itself for minutes in the morning, and the compressor runs long and loud. According to the reports the compressor lasts 80,000 to 100,000 km; and a leaking air spring takes the compressor with it, because it keeps trying to make up the loss.

What to check

  • Look at the car cold, after standing a long time: has it settled on any corner
  • After startup time how long it takes to level, and listen to the compressor
  • Cycle through the ride height settings in the onboard menu and check that all of them work
3 more steps in the write-up

Dual mass flywheel: diesel

expensive

The internal springs of the flywheel tire, and the two discs knock against each other. The signs are a rattling or knocking from the bellhousing at idle and when releasing the clutch pedal, and vibration through the floor. If the clutch slips without a burnt smell, that also points to the flywheel. It is worth replacing in time: a disintegrated flywheel can destroy the bellhousing too. At a clutch replacement the two go together anyway.

What to check

  • At idle, without touching the clutch pedal, listen for the rattle from the bellhousing, then press the pedal: if it stops, that is suspect
  • Watch for the characteristic clatter on starting and switching off
  • Put your foot on the floor at idle: a noticeable vibration indicates tired springs
2 more steps in the write-up

TDI: the vanes of the variable geometry (VNT) turbo stick

expensive

The vanes of the variable geometry turbo are glued together by soot and oil arriving through the EGR. First you get overboost or a lack of boost, then loss of power above 2,000 rpm, and finally limp mode. Caught in time it is enough to remove the turbo, clean it and fit a new actuator rod. Short urban trips and gentle, low rev driving speed up the deposits.

What to check

  • On the motorway, load it above 2,000 rpm: does it pull evenly, or does the power break up
  • Watch whether the warning light flashes up under acceleration (overboost protection)
  • Ask what kind of journeys it did: a daily short urban run is the worst
1 more steps in the write-up

comfort1

Coolant temperature sensor (G62) failure

comfort

The G62 sensor tells the engine control unit how hot the coolant is. If it is faulty, the control unit thinks a warm engine is cold, and runs it rich: hard warm or cold starting, a rough idle, markedly increased fuel consumption, and a dash temperature gauge that jumps around or never reaches its usual reading. The part is cheap and can be replaced in half an hour: the trouble is that many people do not recognise it and replace an injector or a lambda sensor instead. If the fault persists, the rich mixture can destroy the catalytic converter too.

What to check

  • Warm it up and watch the dash temperature gauge: the needle should sit steadily at the middle reading, not jump around
  • Watch a cold start, then a warm start after twenty minutes standing
  • With a code reader look for the 17664 / P1256 code in the engine control unit
2 more steps in the write-up

Checklist

Audi SQ7 TDI quattro

First what you would check on any car. Then the faults of this model.

Before you buy

Checklist

The printed sheet starts with what you would check on any car. What you tick stays on this device only.

On every car

Ask the owner

Faults of this model

vinkodex.com · Before you buy it, see what can go wrong.

Official recall10 recallsShow

The manufacturer fixes these for free at a franchised dealer. Ask with the VIN whether it was done.

Most recent: 19 December 2025

25V900000BACK OVER PREVENTION: SENSING SYSTEM: CAMERABACK OVER PREVENTION: SENSING SYSTEM: CAMERA19 December 2025 · NHTSA (USA)

Volkswagen Group of America, Inc. (Audi) is recalling certain 2019-2026 vehicles. Please see the recall report for a complete list of models. A software error may prevent the rearview camera image from displaying as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "Rear Visibility."

Risk: A rearview image that does not display reduces the driver's view behind the vehicle, increasing the risk of a crash.

Remedy: Dealers will update the software, free of charge. Owner notification letters were mailed January 14, 2026. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 90TV. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on December 23, 2025.

The authority's notice

23V212000FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERAFORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA29 March 2023 · NHTSA (USA)

Volkswagen Group of America, Inc. (Audi) is recalling certain 2020 Q7 vehicles. Incompatibility between the front camera control software and the heating element used for the front camera on the windshield may cause the heating element to overheat.

Risk: An overheated heating element can increase the risk of a fire.

Remedy: Dealers will update the control software and replace the heater element for the front camera, free of charge. Owner notification letters are expected to be mailed May 26, 2023. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 90N7.

The authority's notice

22V516000FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMPFUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP20 July 2022 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2019-2021 Audi Q8, and 2020-2021 Audi Q7 vehicles. A component inside the fuel pump may break, causing the fuel pump to fail.

Risk: Fuel pump failure can cause an engine stall, increasing the risk of a crash.

Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed December 22, 2022. Owners may contact Audi's customer service at 1-800-253-2834. Audi's number for this recall is 20DR.

The authority's notice

21V078000AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE:SOFTWAREAIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE:SOFTWARE17 February 2021 · NHTSA (USA)

Volkswagen Group of America, Inc. (Audi) is recalling certain 2020-2021 Audi Q7 vehicles. The air bag control module may deploy the second stage of the front passenger air bag too quickly after the first stage when the seat is occupied by an unbelted child. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."

Risk: During a crash necessitating the deployment of the passenger air bag, the second stage may deploy too quickly when a child is in the front passenger seat, increasing the risk of injury.

Remedy: Audi will notify owners, and dealers will update the air bag control module, free of charge. The recall began March 5, 2021. Owners can contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 69BV.

The authority's notice

20V658000STRUCTURE:BODY:ROOF AND PILLARSSTRUCTURE:BODY:ROOF AND PILLARS27 October 2020 · NHTSA (USA)

Volkswagen Group of America, Inc. (Audi) is recalling certain 2018-2020 Audi Q7 vehicles. The padding on the vehicle's C-pillar may not absorb enough impact in the event of a crash.

Risk: In the event of a crash, an unbelted occupant's head may impact the vehicle's C-pillar padding, increasing the risk of injury.

Remedy: Audi will notify owners, and dealers will replace the deformation element on the C-pillars, free of charge. The recall began November 17, 2020. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 70H8.

The authority's notice

A12/00504/22Safety recallInjuriesno date · EU Safety Gate

Alteration of the rear axle’s toe and/or camber values lead to increased and uneven wear on the rear tyres, and if worn down to its carcass may suffer a sudden loss of pressure. This can lead to loss of traction and may affect vehicle handling, increasing the risk of an accident. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

A12/00938/21Safety recallInjuriesno date · EU Safety Gate

The cylinder crankcase could be cracked, which could damage the pistons and consequently they may become jammed. This could lead to an engine failure, increasing the risk of an accident.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

INFO/00089/21Safety recallInjuriesno date · EU Safety Gate

Faulty crash sensors for the airbag restraint systems may have been installed in both the front doors. This could impair the protective effect of the side airbags, head airbags and/or belt tensioners, increasing the risk of injury in the event of an accident.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

INFO/00138/21Safety recallInjuriesno date · EU Safety Gate

The nuts on the eccentric bolt of the rear-axle spring-link control arm may break due to stress corrosion. As a result, the rear axle could move in the wrong direction, in an uncontrollable manner at high speeds.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

SR/03859/25Safety recallFireno date · EU Safety Gate

The cell modules of the high-voltage battery could overheat during charging which can lead to a fire. The product does not comply with the Regulation on the approval and market surveillance of motor vehicles and their trailers, and of systems, components and separate technical units intended for such vehicles.

Remedy: Type of economic operator taking notified measure(s): Manufacturer Category of measure(s): Recall of the product from end users Date of entry into force: Unknown

The authority's notice

Engine and transmission

CZAC

320 kW (435 HP) · diesel

AL952 · 8-speed automatic (high-torque, longitudinal)

automatic · 8 speed

Torque limit950 Nm
MakerZF

We built the code from the model and the gear count. The factory sheet does not state it.

Variant data

What is in this version

Factory data

Trim
quattro
Body
SUV
Fuel
diesel
Transmission
automatic
Engine size
3956 cc
Power
320 kW (435 HP)
Drive
AWD
Production
2019–2024

Factory service interval

The manufacturer specifies this for this version. Of the mileage and the time, the one that comes first is the one that counts.

  • Air filter

    • 60,000 km or 4 years

  • Cabin (pollen) filter

    • 30,000 km or 2 years

  • Engine oil and oil filter

    • LongLife30,000 km or 2 years(valid only with LongLife-approved oil)
    • 15,000 km or 1 year

  • Brake fluid change

    • first: 3 years, then 2 years(first change at 3 years, then every two years)

  • Coolant (antifreeze) change

    • first: 193,000 km or 10 years, then 97,000 km or 5 years(G13 / G12++: first change at 120,000 miles or 10 years, then every 60,000 miles or 5 years)

  • Fuel filter, diesel

    • 60,000 km or 2 years
All 4M versions

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms