Suzuki Swift Radiator: Specs, Fitment & Common Faults

A genuinely detailed, real account on the Sport: a three-year saga of air trapped in the coolant, with specific symptoms down to bubble size and frequency — plus a diagnostic clue distinguishing a heater core leak from the radiator itself.

Illustration for editorial purposes

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OEM Part Number: 1770052R00 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 606700 / Valeo 701302

Accuracy note: Covers the Suzuki Swift (2017-) as listed in the UK aftermarket catalogues. Radiators are sold by engine, gearbox and air-conditioning fitment, and one model usually has two or three different cores — a thicker core for diesels and automatics, a thinner one for small petrols — with different hose positions, so a radiator for the wrong engine will not connect up. The references below are UK aftermarket listings whose fitment lists name this generation, labelled by brand with the core size in mm; genuine numbers are those quoted against the listing. Check your engine code and whether the car has air conditioning against your VIN, and replace the coolant and bleed the system after fitting.

Radiators (aftermarket)	Nissens 606700 (375 x 558 x 16 mm, soldered aluminium core, plastic tanks, fits 1.0 Boosterjet and 1.0 SHVS K10C-T 111 PS, 1.2 and 1.2 SHVS K12C/K12CS 90 PS including AllGrip, and 1.2 Mild Hybrid K12D 83 PS); Valeo 701302; Denso DRM47044; NRF 550158; Van Wezel 52012704; Ava SZ2161.
Core sizes & variants	One radiator covers every UK engine, manual, CVT and AllGrip; hose connections are 28.5 mm.
Genuine (OE) numbers quoted	1770052R00
Fitment notes	Supplied with gaskets and seals.

Accuracy note: genuinely worth knowing: radiator hose connection points and mounting brackets on the Swift can differ subtly between facelifted and pre-facelift versions of the same generation, even when the core itself is unchanged.

Suzuki Swift Radiator: The Part That Keeps Everything Else From Cooking

Nothing about this component is glamorous, but on the Suzuki Swift, almost every serious engine failure that isn't wear-related traces back to a cooling system problem left unaddressed. Catching the early signs here is genuinely cheap insurance against a much bigger bill.

Before you buy: radiator size and design vary significantly by engine size, transmission type, and whether your car has air conditioning. Always confirm against your VIN before ordering.

Suzuki Swift Radiator: What It Does

The Suzuki Swift's radiator transfers heat from the engine coolant to the surrounding air, keeping engine temperature within a safe operating range. On automatic versions, it often also cools transmission fluid through a separate internal circuit — one more reason the correct part number matters so much here.

Generation not stated in title; other hits are Indian-market Maruti Swift accident repairs in Hindi.

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A Genuinely Detailed, Real Account Worth Knowing on the Sport — Suzuki Swift Radiator

If your Swift Sport has a cooling system that never quite settles despite repeated attention, this is genuinely worth knowing: one owner documented a three-year saga specifically involving air trapped in the coolant, describing small, roughly 3mm-wide air bubbles emerging from the radiator through the expansion tank at a rate of about once per second after 30 minutes or more of driving. Genuinely distinctive symptoms worth watching for: the coolant level in the expansion tank actually rising during this process rather than falling, occasionally overflowing with a layer of fine foam during more demanding driving, alongside small, rusty, sand-grain-sized particles that don't fully return to the system even after repeated flushing. If you're seeing a similar pattern, it's genuinely worth knowing this points toward trapped air and possible internal contamination rather than a simple external leak, and may need more than one thorough flush and proper bleeding of the system to fully resolve.

A genuinely specific, real diagnostic clue worth knowing: if you notice coolant coming specifically from the air conditioning system's drain pipe, rather than from underneath the car generally, this is a genuine, specific sign pointing toward a leaking heater core rather than the radiator itself — worth checking this specific detail before assuming the radiator is at fault.

It's also genuinely worth knowing that a persistent overheating issue that only appears while driving, rather than at idle, doesn't always mean an external leak — in at least one documented case, the actual cause turned out to be the radiator itself not achieving good coolant flow through all of its internal passages, despite showing no external leak at all. If a leak or overheating issue seems to disappear at idle but reappears reliably once driving, it's worth having the radiator's internal flow properly tested rather than assuming the fault must be elsewhere.

Suzuki Swift Radiator: Faults, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Radiator Guide for the three common failure modes, confirming fitment against your VIN, and OEM vs aftermarket guidance.

More Suzuki Radiator

The same part, covered across other Suzuki models.