A4 SUSPENSION & STEERING // FLAGSHIP DIAGNOSTIC
2016 FWD SEDAN
2.0L · 88,000 mi · pulls right + inner tire wear
Customer concern
"Vehicle drifts to the right at highway speed. Recently replaced tires because the old ones were worn down to the cords on the inside edges of both front tires."
Pre-checks
DTC: None TIRE PRESSURE: All four 35 psi (spec 33) — MARGINAL TIRE TREAD WEAR: Inner edges worn faster, both — FAIL RIDE HEIGHT: Front 1.5 in low (equal sides) — FAIL STEERING WHEEL: Off-center 3° right when straight — FAIL PULL: Mild right pull on flat road — FAIL
Inner edge wear on both fronts + low ride height + pulling right. The alignment is gone. Find what's hiding behind it.
Step 1 · Read the tire wear
Both front tires came off worn to the cords on the inside. Read the tread depths across the contact patch before you blame the alignment.
Front tire · tread close-up
Tread depth gauge · /32"
Same pattern on BOTH front tires — inner rib gone, center & outer healthy.
Inner-edge wear on BOTH front tires (not just one) indicates what alignment condition?
Step 2 · Ride height & springs
Measure the front fender-to-hub at both corners. It's sitting low — equally on both sides. Connect the ride height to the camber that ate the tires.
Side view · front corner · ride height
Ride height is 1.5 in LOW on both fronts (equal side-to-side). What's the most likely cause + what does it do to camber?
Step 3 · Dry park test
Wheels on the ground, engine running. Rock the steering left-to-right while a helper watches the tie rods and ball joints for play.
Steering input
Component movement
Worn right outer tie rod end, plus sagged springs causing excess negative camber. How does this combination create the pulling complaint?
Step 4 · Alignment rack readings
On the rack now. Measured angles against spec. Read the cross-caster and call the pull direction.
FixedIntel Alignment Rack · front
measured vs specSpec — camber -0.5° to +0.5° · caster +4° to +5° · cross-caster ≤0.5° · toe +0.10° to +0.20° · thrust ≤0.10°
The cross-caster shows the LEFT side 0.6° lower than the right. Per the cross-caster pull rule, which direction will the vehicle pull?
Step 5 · Root cause
Inner-edge wear from excess negative camber, a worn right outer tie rod, and cross-caster all stacked on one car. What's the root cause and the right fix?
What is the root cause of this customer's combined complaint (inner-edge tire wear + right pull)?
Diagnosis Closed.
Springs and outer tie rods replaced, four-wheel alignment held — no comeback in six months.
0:00
Time elapsed
0/60
Score
0%
Efficiency
A4 · STEERING & SUSP
Profile +14 pts
Real-shop equivalent
In a real bay, this is the comeback nobody wants: tires and an alignment sold, the car back in six months with the inner edges gone again. Catching the sagged springs and worn tie rod the first time means the alignment holds — one repair, no warranty redo. A tech who reads ride height and dry-park before the rack saves the shop the redo and keeps the customer. Every scenario you train sharpens the cert and the daily diagnostic edge.