Malaysia is the easiest of Thailand's land borders to drive across and by far the busiest. Two crossings in Songkhla province take the great majority of the traffic — Sadao, opposite Bukit Kayu Hitam in Kedah, and Padang Besar, opposite its namesake in Perlis. Both are reached on Highway 4, both take private cars and motorbikes, and both connect Thailand's road network directly to Malaysia's North–South Expressway.
Two things make it easier than the Lao or Cambodian frontiers. Both countries drive on the left, so there is no carriageway swap and no re-learning of junctions. And the crossings are properly built, properly staffed and open long hours. What has not changed is the rental position: a Thai hire car cannot go with you, and no amount of asking at the counter will alter that.
- Main crossingSadao, Songkhla – Bukit Kayu Hitam, Kedah
- Second crossingPadang Besar, Songkhla – Padang Besar, Perlis
- Driving sideLeft in both countries — no changeover
- Hire carsNot permitted to leave Thailand
Sadao and the new complex
Sadao is Thailand's busiest land border crossing. A new permanent border complex on the Thai side, whose main buildings had stood finished since 2019, finally entered full service in July 2026 once the connecting road on the Malaysian side was opened — the two prime ministers cut the ribbon on 10 July 2026, and the new alignment came into use the following day.
The new facility is a substantial upgrade: around eleven vehicle lanes and fourteen immigration lanes on each side, plus a separate cargo terminal with scanning and weighing for freight. It operates daily from 05:00 to 23:00 Thai time. The Thai border town on this side is Dannok, a strip of hotels, shops and massage parlours that exists entirely because of the border; on the Malaysian side the first town is Changlun, and the expressway begins almost immediately.
Directions written before mid-2026 send you to the old checkpoint. Follow the signs on the ground rather than an old map, and expect the approach roads on both sides to have changed.
Padang Besar
Padang Besar, west of Sadao and also in Songkhla province, is the second vehicle crossing and considerably quieter. It is the one to use if the Sadao queues are long, and it is also a rail crossing — which matters, because the FCDO advises against all but essential travel on the Hat Yai to Padang Besar train line, while not naming Sadao district itself as an area to avoid. That distinction is worth understanding properly and is set out in driving in the deep south: what the advice says.
The other crossings
Several smaller crossings exist along the frontier, and the reason most visitors never use them is geography rather than paperwork.
| Thai side | Province | Malaysian side | Note |
|---|---|---|---|
| Sadao | Songkhla | Bukit Kayu Hitam, Kedah | Main crossing; onto the E1 expressway |
| Padang Besar | Songkhla | Padang Besar, Perlis | Quieter; also a rail crossing |
| Wang Prachan | Satun | Wang Kelian, Perlis | Small, scenic, limited hours |
| Ban Prakob | Songkhla | Durian Burung, Kedah | In Na Thawi district — inside the UK advisory area |
| Betong | Yala | Pengkalan Hulu, Perak | Inside the advisory provinces |
| Sungai Kolok / Buketa | Narathiwat | Kelantan | Inside the advisory provinces |
Sadao, Padang Besar and Wang Prachan sit outside the provinces and districts named in the UK and Australian travel advisories. The eastern crossings do not. If your reason for choosing a crossing is convenience rather than necessity, that settles it.
The paperwork
The requirements are broadly symmetrical and revolve around proving the vehicle is yours to take.
- Passport, plus any visa either country requires of your nationality.
- The vehicle registration document. For a Thai vehicle that is the blue book for a car or the green one for a motorbike, in your name or with a signed, usually notarised authorisation from the registered owner. See the Thai registration book explained.
- Thai immigration vehicle forms — TM2 for the vehicle and TM3 for passengers. Print and complete them in advance if you can; it saves a queue.
- Your driving documents. What you should be carrying is covered in the International Driving Permit for Thailand and which licence you can use. Confirm the Malaysian position separately with your own motoring organisation.
- Insurance valid on the other side. Thai motor cover stops at the border. Malaysian third-party cover for a foreign vehicle is bought locally, and Malaysian drivers heading north buy Thai cover at Changlun or Dannok in the same way.
Coming the other way, a foreign-plated vehicle entering Thailand for the first time is a separate process again — see bringing a foreign-plated vehicle into Thailand.
Malaysian tolls are cashless
This catches Thai and foreign drivers out constantly. Malaysia's expressways, including the North–South Expressway you join within a few kilometres of Sadao, do not accept cash at the toll plaza. Payment is by Touch 'n Go card or the RFID tag linked to it, and without one you cannot pass.
Buy a Touch 'n Go card before you need it. They are sold at the border complex, at Malaysian petrol stations and at convenience stores, and they can be topped up at the same places. Thailand's own toll system still takes cash, so this is a genuine change of habit at the frontier and not something to discover at the first plaza.
Rental cars: still no
Thai rental agreements prohibit taking the vehicle out of the country. The rental company holds the registration book, will not release it, and the insurance is written for Thailand only. This is not a border-specific problem; it applies at Sadao exactly as it does at Nong Khai. The detail, including the handful of specialist operators who arrange cross-border hire with paperwork prepared in advance, is in can you take a rental vehicle out of Thailand?
If your plan is to drive down through Thailand and continue into Malaysia, the practical answer is two hires: return the Thai car at Hat Yai and pick up a Malaysian one on the far side. Our renting section covers what one-way and cross-region hires actually cost.
Driving on the far side
Malaysia will feel orderly after Thailand. Lane discipline is better, the expressways are excellent, and enforcement is stricter — but you are still driving on the left, the signage is in a Latin alphabet, and English is widely understood. The bigger adjustment is going the other way: a Malaysian driver arriving in Thailand meets a driving culture with rather different conventions, described in how Thai traffic actually works.
Frequently asked questions
Which is the best border crossing from Thailand to Malaysia?
Sadao, opposite Bukit Kayu Hitam, for the direct link to the North–South Expressway and Kuala Lumpur. Padang Besar if Sadao is queuing or if you are heading for Perlis and Langkawi.
What are the Sadao opening hours?
The new permanent complex operates daily from 05:00 to 23:00 Thai time. Malaysia is one hour ahead of Thailand, which is worth remembering when planning an arrival.
Can I take a Thai hire car into Malaysia?
No. Mainstream Thai rental contracts forbid the vehicle leaving the country, and without the registration book the crossing cannot be processed.
Do Thailand and Malaysia drive on the same side?
Yes, both drive on the left. There is no carriageway changeover, unlike the Lao and Cambodian borders.
Do I need Malaysian insurance?
Your Thai motor policy does not cover you in Malaysia. Cover for a foreign vehicle is arranged locally; ask at the border complex and confirm with your own insurer what, if anything, follows the vehicle across.
Is the road down to the border safe?
Highway 4 through Hat Yai to Sadao runs outside the provinces and districts named in the UK and Australian travel advisories. The eastern route through Pattani and Narathiwat does not. See what the advice says before choosing a route.