Federal Route 171, or Jalan Serdang–Selama (formerly Kedah state route K7), is a federal road in Kedah, Malaysia.^[1]

At most sections, the Federal Route 171 was built under the JKR R5 road standard, allowing maximum speed limit of up to 90 km/h.

km	Exit	Junctions	To	Remarks
		Serdang	North FT 136 Kulim FT 136 Bukit Mertajam FT 136 Butterworth South FT 136 Bandar Baharu FT 136 Parit Buntar North–South Expressway Northern Route AH2 North–South Expressway Northern Route Bukit Kayu Hitam Penang Ipoh Kuala Lumpur	T-junctions
		Kuala Selama	North FT 170 Jalan Mahang–Selama Mahang	T-junctions
Kedah Darul Aman Bandar Baharu district border
Kedah–Perak border
Perak Darul Ridzuan Larut, Matang & Selama district border Selama sub-district border
		Sungai Relau
		Selama	Northeast A115 Jalan Rantau Panjang Rantau Panjang Sungai Bayor South FT 147 Kubu Gajah A6 Taiping FT 147 Bagan Serai	T-junctions