What is OEM number 4G1423055DJ and which part does it identify?

OEM number 4G1423055DJ identifies the steering rack for the Audi A6 C7 and A7 Sportback generation. The component is an electric power steering (EPS) assembly built for left-hand drive vehicles, and it is fitted across the 2011 to 2018 production window depending on model. It is also known as the steering gear assembly. Genuine Audi Part 4G1423055DJ is cross-referenced with 4G1423055BG and 4G1423055DC. Superseded number: 4G1423055EA. OEM number 4G1423055DJ may fit additional vehicle models not listed here, so always verify against the OEM number on your existing part.

Does OEM number 4G1423055DJ fit my vehicle?

OEM number 4G1423055DJ fits the Audi A6 C7 saloon and Avant, and the Audi A7 Sportback, built between 2011 and 2018. The part is designed for left-hand drive vehicles only, and it is an electric power steering rack rather than a hydraulic unit, so it must be matched to vehicles fitted with the same electric-assist steering system.

Fitment is not gated by drivetrain in the same way across the range: the rack is used on both front-wheel-drive and quattro all-wheel-drive variants of the A6 C7 and A6 C7 Avant, and on the quattro-equipped A7 Sportback. Because the part is left-hand drive specific, right-hand drive vehicles require a different OEM number and this rack must not be fitted to them.

Cross-reference data also associates OEM number 4G1423055DJ with the Audi Q5 (8RB), but the Q5 is built on a different platform generation from the A6/A7 C7 range, so this fitment should not be assumed. Verify the printed number on your existing part before ordering for a Q5.

OEM number 4G1423055DJ may fit additional vehicle models not listed here. Always verify by checking the OEM number printed on your existing part.

Fits: Audi A6 C7 (4G2, 4GC) 2.0 TDI and 2.0 TDI quattro (2013-2018 / 2015-2018), Audi A6 C7 Avant (4G5, 4GD) 2.0 TDI (2012-2018), Audi A7 Sportback (4GA, 4GF) 2.8 FSI quattro (2011-2015) — left-hand drive, electric power steering only
Does not fit: right-hand drive vehicles; unconfirmed for Audi Q5 (8RB)

How is OEM number 4G1423055DJ installed?

Replacing the steering rack is a suspension and steering task rather than a simple bolt-on job. The procedure requires a four-wheel alignment after fitting, because the steering geometry (toe and, on some variants, camber) is disturbed when the rack is removed and refitted. As the unit is an electric power steering assembly, it also requires a diagnostic tool capable of steering system calibration to relearn the centre position and clear any fault codes. Skipping the alignment step causes uneven tyre wear and the steering wheel will sit off-centre when driving straight ahead.

1. Confirm the steering wheel is centred and the road wheels point straight ahead before removal.
2. Check for stored fault codes in the steering control module after installation.
3. Perform the steering angle sensor calibration or relearn procedure.
4. Carry out a four-wheel alignment.
5. Road test to confirm no residual steering wheel offset or warning lights.

When should OEM number 4G1423055DJ be replaced?

Replacement triggers

• Steering wheel feels loose or has excessive free play before the wheels respond.
• Whining, grinding, or clicking noise from the steering rack when turning the wheel.
• Steering assistance feels inconsistent, heavy, or cuts out intermittently.
• Steering warning light illuminated on the dashboard.
• Vehicle pulls to one side or steering response feels uneven side to side.
• Visible fluid leakage or corrosion around the rack housing on older units.

We used AI to help write this text. We regularly check the information - but cannot guarantee that all data is accurate.