vinkodex.

Audi SQ7 4.0 TDI quattro common faults.

2015–2019, SUV, diesel, 435 HP.

The fault list covers: CZAC engine, AL952 transmission.

What you save stays on this device only. My saves

4 fault write-ups. 3 important. 7 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 4.0 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 recall7 recallsShow

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

Most recent: 16 March 2020

20V149000STEERINGSTEERING16 March 2020 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2019 Audi Q8 and 2017-2019 Audi Q7 vehicles. The bolt connecting the steering shaft to the steering gear may loosen, possibly resulting in a loss of steering control.

Risk: A sudden loss of loss of steering control may increase the risk of a crash.

Remedy: Volkswagen will notify owners, and Audi dealers will inspect and, if necessary, replace the steering shaft bolt, as necessary, free of charge. The recall began March 31, 2020. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 36A1.

The authority's notice

19V035000FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAILFUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:FUEL RAIL16 January 2019 · NHTSA (USA)

Volkswagen Group of America, Inc. (Audi) is recalling certain 2016-2018 Q7, A6 and A7 vehicles, and 2015-2018 Audi A8 vehicles. The left and right fuel rails may leak fuel.

Risk: A fuel leak in the presence of an ignition source can increase risk of a fire.

Remedy: Audi has notified owners, and dealers will replace the left and right fuel rail, free of charge. The recall began February 28, 2019. Owners may contact Audi customer service at 1-800-253-2834. Audi's number for this recall is 24DP.

The authority's notice

16V648000STEERING:ELECTRIC POWER ASSIST SYSTEMSTEERING:ELECTRIC POWER ASSIST SYSTEM8 September 2016 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2017 Audi Q7 vehicles manufactured November 11, 2015, to November 23, 2015. In the affected vehicles, the electric power steering assist control unit may short circuit resulting in a loss of power steering assist.

Risk: With a loss of power steering assist, extra steering effort will be required, especially at lower speeds, increasing the risk of a crash.

Remedy: Audi will notify owners, and dealers will replace the steering rack, free of charge. The recall began November 2016. Owners may contact Audi customer service at 1-800-822-2834. Volkswagen's number for this recall is 48M5.

The authority's notice

16V641000SEATS:MID/REAR ASSEMBLYSEATS:MID/REAR ASSEMBLY6 September 2016 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2017 Audi Q7 vehicles manufactured August 30, 2015, to July 10, 2016. In the affected vehicles, the third row seat back may move forward under load, such as in a frontal collision. As such, the vehicles do not conform to Federal Motor Vehicle Safety Standard (FMVSS) number 207, "Seating Systems."

Risk: If the third row seat does not remain in its adjusted position, there may be an increased risk of injury to an occupant in the event of a crash.

Remedy: Audi will notify owners, and dealers will install an additional support bracket to the seat, free of charge. The recall is expected to begin in November 2016. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 72F8.

The authority's notice

16V642000ELECTRICAL SYSTEM:SOFTWAREELECTRICAL SYSTEM:SOFTWARE6 September 2016 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain model year 2016 TT roadster, A3 cabriolet, A3 sedan and A3 e-tron, 2016-2017 TT coupe, 2017 A4 sedan and Q7 and 2015-2017 Q3 vehicles. The affected vehicles may have been programmed with new software that inadvertently makes the side marker lights inoperative in conjunction with the parking lights or the headlights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."

Risk: If the side marker lights do not illuminate, the vehicle may be less visible at night, increasing the risk of a crash.

Remedy: Audi will notify owners, and dealers will upload revised software to correct the issue, free of charge. This recall began November 2016. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 97CB.

The authority's notice

16V519000AIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVEAIR BAGS:FRONTAL:SENSOR/CONTROL MODULE-INACTIVE8 July 2016 · NHTSA (USA)

Volkswagen Group of America, Inc. (Volkswagen) is recalling certain 2017 Audi Q7 vehicles manufactured August 30, 2015, to May 8, 2016. Due to a software issue within the air bag control module, the frontal air bags may deploy with more force than required in certain crashes. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."

Risk: Air bags that deploy with excessive force may increase the risk of injury.

Remedy: Volkswagen will notify owners, and dealers will update the air bag control module software, free of charge. The recall began September 2016. Owners may contact Audi customer service at 1-800-253-2834. Volkswagen's number for this recall is 69O3.

The authority's notice

A12/00547/20Safety recallInjuriesno date · EU Safety Gate

The screw connection between the steering shaft and the steering box may not have been tightened sufficiently and may loosen over time. This will impair the vehicle’s steerability, 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

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
2015–2019

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.

  • Fuel filter, diesel

    • 60,000 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

  • Air filter

    • 60,000 km or 4 years

  • 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)

  • Cabin (pollen) filter

    • 30,000 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