2026-08-20 · 5 min read
Audi A5 Workshop Cases Malaysia — 4M Car Care
Real A5 cases: A5 8T 2.0T DQ200 58,000 km low-speed judder — fluid due at 20,000 km, never changed. Fluid flush + VCDS recalibration partially resolved (mechatronic wear). Advised owner on trade-in. B9 A5 2.0T 72,000 km rough cold idle — carbon confirmed via borescope. Walnut blast idle restored. S5 8T 88,000 km HPFP fault — cold start stutter, P0087. HPFP replaced resolved.
Case 1: A5 B9 Sportback — HPFP Cam Follower (58,000 km)
A5 B9 45 TFSI, 58,000 km: customer reported intermittent rough idle and occasional P0087 (fuel pressure low). VCDS confirmed fuel pressure sensor data borderline. Before condemning HPFP, we inspected the cam follower — found 0.8mm wear (limit is 0.5mm). Replaced follower () only, cleared adaptation. Engine returned to normal fuel pressure immediately. If we had jumped to HPFP replacement, cost would have been +. Cam follower first, always.
Case 2: A5 B9 — DQ381 + Carbon Double Service (75,000 km)
A5 B9 Sportback, 75,000 km: owner noticed slightly rough gear engagement and reduced fuel economy. VCDS: DQ381 mechatronic adaptation at 78% limit (fluid never changed). Carbon inspection confirmed heavy buildup on intake valves. Combined service: DQ381 fluid () + walnut blast () + brake fluid (). Post-service: smooth shifts, economy improved from 15 to 13.5 L/100km city. Mechatronic adaptation reset to 12%. Owner delighted with the difference.