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2020- 2023 SQ8 4.0t EA825 ECU+TCU TUNE (REMOTE TUNE)

$650.00 $550.00
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Width:
7.00 (in)
Height:
6.00 (in)
Depth:
1.00 (in)
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Audi SQ8 — Choose Your Stage

2020–2024 Audi  SQ8 • 4.0T TFSI EA825 V8 Twin-Turbo • Quattro AWD

Stage 1
687 HP
815 FT-LBS
Stock Hardware
Stage 2
740 HP
890 FT-LBS
High-Flow Exhaust Req.
SAVE WITH THE BUNDLE

ECU + TCU Tune Bundle

 Faster, firmer shifts • raised torque limits • full neutral/park rev limiter access • optimized shift behavior under boost. The ECU tune gets to do its full job with a supporting TCU calibration. 

BOOST DYNAMIC TUNING

BDT Stage 1 ECU Tune

2020–2024 Audi SQ8 • 4.0T TFSI EA825 V8 • Quattro AWD

Slide into the cockpit, hit start, and the 4.0T V8 growls to life — this isn’t your dad’s SUV anymore. With BDT Stage 1, the SQ8 becomes an absolute menace in luxury disguise. 687 HP / 815 TQ by safely unlocking the factory twin-turbos. Reliable daily driver, ruthless on demand.

Twin-Turbo 4.0T V8 Quattro AWD Crackle Pops Remote OBDII Flash ECU + TCU Bundle
Audi SQ7 SQ8 Stage 1 BDT
SQ8 STAGE 1
Luxury sleeper. Freight-train torque on stock hardware.
 
Stage 1 Requirements: No hardware required — stock supported. A TCU tune, intake, and intercoolers are highly recommended.

Fitment & Compatibility

Confirm your exact engine and hardware before purchase.

 

Vehicle: 2020–2024 Audi SQ8 (4M)

Engine: 4.0T TFSI EA825 V8 Twin-Turbo (Mild Hybrid)

ECU: Bosch MG1

  • Quattro AWD (Torsen center diff)
  • ZF 8HP95 8-Speed Automatic
  • 91–93 octane
  • Remote OBDII flashing compatible

Stage 1 Highlights

  • 687 HP / 815 TQ on 93 octane
  • Speed limiter removed
  • Rev limiter raised (neutral/park, TCU tune req.)
  • Auto Start/Stop defaults OFF
  • Torque limiters raised
  • Fueling optimized by load & throttle
  • Boost gauge re-scaled
  • Crackle Pops (Dynamic mode)
  • Refined boost control — linear onset
  • Reduced turbo lag
  • LPFP/HPFP targets optimized
  • VVT recalibrated
  • OBDII port flashing

Why Choose BDT?

  • Audi 4.0T V8 Tuning Expertise: Purpose-built for the EA825 Bosch MG1 platform with OEM-level tools and real-world refinement.
  • Authenticity Over Hype: Every file written in-house — no resellers, no copy/paste calibrations.
  • Remote Flashing: Flash your SQ8 via OBDII at home. No ECU shipping. No shop scheduling.
  • Dyno-Tested & Street-Proven: Backed by data and validated under real load on the 4.0T V8.

Stage 1 Live Content

SQ7 / SQ8 STAGE 1 DYNO

Power Gains

Expected Stage 1 gains on 93 octane: up to 687 HP / 815 FT-LBS

 
Stage Horsepower Torque
Stock Audi advertised 500 HP 568 FT-LBS
Stage 1 93 octane 687 HP 815 FT-LBS
Stage 2 (high-flow exhaust req.) 740 HP 890 FT-LBS

Stage 1 Hardware Requirements

No hardware required. Stock 4.0T V8 supported right out of the box.

✅ Cross-Stage Upgrade Matrix

Stage TCU Tune Intake Intercooler High-Flow Exhaust Drivetrain Inserts
Stage 1
Stage 2 YES
BOOST DYNAMIC TUNING

BDT Stage 2 ECU Tune

2020–2024 Audi SQ7 & SQ8 • 4.0T TFSI EA825 V8 • Quattro AWD

When Stage 1 isn’t enough, BDT Stage 2 pairs the factory twin-turbos with a high-flow exhaust for 740 HP / 890 TQ. Harder hit, stronger midrange, cleaner pulls — without sacrificing daily drivability.

High-Flow Exhaust Req. Quattro AWD Crackle Pops Remote OBDII Flash ECU + TCU Bundle
Audi SQ7 SQ8 Stage 2 BDT
SQ7 / SQ8 STAGE 2
740 HP / 890 TQ. Exhaust opened. Turbos unleashed.
 
Stage 2 Requirement: A high-flow exhaust is required. TCU tune, intake, and intercoolers are strongly recommended.

Stage 2 Highlights

  • 740 HP / 890 TQ on 93 octane
  • Speed limiter removed
  • Rev limiter raised (neutral/park, TCU tune req.)
  • Auto Start/Stop defaults OFF
  • Torque limiters raised
  • Fueling optimized by load & throttle
  • Boost gauge re-scaled
  • Increased Crackle Pops (Dynamic mode)
  • Refined boost control — linear onset
  • Reduced turbo lag
  • LPFP/HPFP targets optimized
  • VVT recalibrated
  • OBDII port flashing

Mod Requirements

Part Req. Rec.
High-Flow Exhaust YES
TCU Tune (ZF 8HP95) HIGHLY REC.
Air Intake YES
Intercoolers YES
Turbo Inlet Pipes YES
Drivetrain Insert Upgrades YES

Stage 2 Live Content

SQ7 / SQ8 DYNO

Power Gains

Expected Stage 2 gains on 93 octane: up to 740 HP / 890 FT-LBS

 
Stage Horsepower Torque
Stock Audi advertised 500 HP 568 FT-LBS
Stage 1 93 octane 687 HP 815 FT-LBS
Stage 2 93 octane + high-flow exhaust 740 HP 890 FT-LBS

⚠️ SOFTWARE REQUIREMENTS: Windows PC or laptop required for remote flashing. 50+ Mbps internet8GB+ RAM • TeamViewer installed. Mac is not supported at this time.

How Remote Tuning Works

Flash your SQ7 / SQ8 from home — no shop visit needed.

 
1

Schedule Your Flash — After purchase, scan the QR code or contact BDT to book your appointment.

2

Download TeamViewer — Install on your Windows laptop. BDT remotes in to run the flash software.

3

Hook Up Battery Charger — Positive first, then negative. Stable voltage is critical.

4

Turn Car to Accessory Mode — Key in ignition or press start without brake. Do not start the engine.

5

Plug In OBDII Cable — Connect to the OBDII port (driver side, under dash).

6

BDT Takes Remote Control — We handle everything. You watch the entire process live.

7

Key Off on Command — When BDT says “turn key off,” do it immediately.

8

Disconnect & Drive — Unplug OBDII, remove charger (negative first, then positive), start the car, enjoy.

Post-Flash Note: You may see a few fault codes after flashing — this is normal. They clear after a short drive cycle.

HOW REMOTE TUNING WORKS

Frequently Asked Questions

 

Q: What mods are required for Stage 1?
A: None. Stage 1 supports stock hardware. A TCU tune, intake, and intercoolers are highly recommended for best results.

 

Q: What mods are required for Stage 2?
A: A high-flow exhaust is required. TCU tune, intake, intercoolers, turbo inlet pipes, and drivetrain inserts are strongly recommended.

 

Q: Is Stage 1 safe on the stock 4.0T V8?
A: Yes — when maintenance is followed. Stage 1 is calibrated around safe boost targets with OEM protection logic on factory hardware.

 

Q: What fuel do I need?
A: 91 or 93 octane required. Running lower octane will reduce power and trigger knock protection.

 

Q: Do I need a TCU tune?
A: Not required, but highly recommended. The ZF 8HP95 responds extremely well to a TCU tune — faster, firmer shifts, raised torque limits, and full access to the neutral/park rev limiter. BDT offers an ECU + TCU bundle at a discounted price so your tune gets the full supporting calibration it deserves. Contact BDT for current bundle pricing.

 

Q: How do crackle pops work?
A: Crackle pops activate in Dynamic drive mode. Subtle on the factory exhaust, absolutely unhinged with a high-flow exhaust installed.

 

Q: Will this affect the mild hybrid system?
A: No. Our calibration keeps the 48V mild hybrid system fully functional. Start/stop is defaulted off by the tune.

 

Q: Do I need a Windows computer?
A: Yes. The flashing software requires Windows. Mac is not supported. 50+ Mbps internet and 8GB+ RAM required.

Maintenance (Read This)

IF YOU WANT YOUR CAR TO SURVIVE, THESE MUST BE DONE!

We want your SQ7/SQ8 to live a long, happy tuned life. These intervals come from years of tuning the 4.0T V8 platform. If these aren’t kept up, failures happen — and it won’t be the tune.

 
Maintenance Item Interval
SPARK PLUGS
NGK OEM-spec Iridium (1 heat range colder recommended for tuned) — contact BDT for part number
20–30K mi
OIL CHANGE
Audi-approved 0W-30 or 5W-40 Liqui Moly • OEM FILTER ONLY
5K mi
ZF 8HP95 TRANSMISSION FLUID SERVICE
ZF LifeguardFluid 8 • Pan gasket & filter included
60–80K mi
FRONT & REAR DIFFERENTIAL FLUID
OEM or approved 75W-90 GL-5 • Torsen-friendly
60K mi
MAP SENSORS
OEM only • Intake / before throttle body
80K mi
PCV ASSEMBLY 80K mi
INJECTORS + CARBON CLEANING
Do them on time to avoid misfires, lean conditions, and long-term damage.
85K mi

Late Policy: If you schedule an in-person flash and arrive late without notice, a $50 fee applies. Reschedules must be made at least 1 hour prior.