2026-08-15 · 5 min read
BMW 4 Series Spark Plugs Malaysia — N20/B48/B58
F32 N20: 4 iridium plugs every 60,000 km. G22 B48: 4 iridium plugs every 60,000 km. G22 M440i B58: 6 plugs (inline-6) every 60,000 km — RM 450–700 including labour. 4-cyl Malaysia cost RM 250–450. Always inspect ignition coils simultaneously — common failure at same mileage.
4 Series Spark Plugs
- N20/B48 (4-cyl): 4 × NGK ILZKBR7B8G — every 60,000 km
- B58 (6-cyl, M440i): 6 × NGK iridium — every 60,000 km
- Cost: RM 380–520 (4-cyl) / RM 550–750 (6-cyl)
Iridium Plugs — Worth the Premium
The 4 Series's N20/B48 (F3x) or B48/B58 (G2x) engine requires iridium spark plugs — these are more expensive than standard copper or platinum plugs but last significantly longer (60,000 km vs 20,000 km). Using cheaper non-iridium plugs in a BMW direct-injection turbo engine causes rough idle, misfires, and can trigger coilpack damage. At 60,000 km intervals, iridium plugs actually cost less per kilometre than cheaper alternatives. Always replace all plugs as a set and inspect coils while the engine is open.