Radiator Cap 1.10 bar 44mm for Toyota Hilux, Honda, Mazda & Ford Ranger - RC1-16

Vehicle Fitment & Part Details

This radiator cap (SKU RC1-16) is a 1.10 bar pressure-rated metal cap with a 44 mm outer diameter and 15 mm seal height, fitting a wide range of Asian and GM-built passenger vehicles and bakkies sold in South Africa from the 1990s through current production. The cap is verified by OE number match and neck geometry - always confirm the pressure rating and neck profile on your existing cap before ordering.

Key Details

SKU

RC1-16

Component

Radiator Cap

Pressure Rating

1.10 bar (16 psi / ~110 kPa)

Outer Diameter

44 mm

Height

15 mm

Material

Metal

Applications

110 supplied

Key Benefits

• 1.10 bar pressure-rated metal radiator cap covering a broad range of Toyota, Honda, Mazda, Mitsubishi, Suzuki, Daihatsu, Ford, Hyundai, Lexus and Chinese-built vehicles sold in South Africa.
• Cross-referenced to 69+ OE part numbers across 10 vehicle manufacturers for accurate matching.
• Metal construction for durability - replaces plastic caps prone to cracking from pressure cycling and coolant temperature.

OEM Reference Numbers

• Citroen / Peugeot: 1306 F4
• Daihatsu: 16401-87211, 16401-87211-000, 16401-87212, 16401-87212-000, 16401-87405, 16401-97202, 16401-31520
• Fiat: 71742152
• Honda: 19045-PAA-A01, 19045-PAA-A51, 19045-PNC-004, 19045-PSL-F01, 19045-PWA-004, 19045-PY3-003, 19045-PY3-013, 19045-P08-003, 19045-P08-004, 19045-P08-013, 19045-P08-014, 19045-P45-G01, 19045-RAA-003, 19045-RAA-A51
• Mazda: B3C7-15-205, LFB7-15-205, WL21-15-205, WL81-15-205, WL81-15-205A, ZM43-15-205
• Mitsubishi: MR 597 126
• Nissan: 17920-77A00
• Opel: 47 09 376
• Suzuki: 17820-M79F10, 17920-54L00, 17920-56B00, 17920-66F00, 17920-66F01, 17920-66F01-000, 17920-75F00, 17920-75F00-000, 17920-M75F00, 17920-M75F00-000, 21430-4A0A0
• Toyota / Lexus: 16401-0H060, 16401-0M010, 16401-0Y060, 16401-02420, 16401-15520, 16401-28120, 16401-28280, 16401-28430, 16401-31480, 16401-31520, 16401-31650, 16401-31680, 16401-31790, 16401-31791, 16401-31792, 16401-31830, 16401-36020, 16401-46610, 16401-50370, 16401-50371, 16401-5B630, 16401-62100, 16401-6A140, 16401-75440, 16401-7A470, 16401-97202

Note: Lexus and Toyota share radiator cap part numbers within the Toyota Group - listed together. Citroen and Peugeot share OE 1306 F4 within the PSA Group.

Product Specifications

Vehicle Fitment

Includes 110 supplied applications.

Fitment Notes

• Always verify the pressure rating on your existing cap matches 1.10 bar (sometimes marked "1.1" or "16 psi" on the cap face). Using an incorrect pressure rating may trigger cooling system issues or boil-over.
• Measure the neck opening on your radiator (or old cap outer diameter) to confirm 44 mm fitment.
• This list reflects 110 South African market applications. Vehicles not officially sold in South Africa (Citroen C1, Peugeot 107) are not listed in the fitment table, but the corresponding OE numbers (1306 F4 for C1/107) are retained in the OEM reference section as identification aids.
• Honda FIT (JDM/US market name) and Honda JAZZ II (SA/EU market name) with the L13A1 engine are the same vehicle - listed here as JAZZ per SA market naming.
• Some listed engine codes span multiple bakkie body variants (e.g. 4x2 / 4x4 / Hi-Trail) - these share the same radiator cap as the cooling system is identical across drivetrain variants.
• Open-ended dates (e.g. "2007-") indicate the model is still in production at the supplier catalogue date.

Installation / Use / Maintenance Tips

• Ensure the engine is cold before removing the old cap. For vehicles that have been run, wait at least one hour or until the upper radiator hose is cool to the touch.
• Inspect the rubber seal on the underside of the new cap - it must be intact, flexible, and free of cuts or deformation.
• Wipe the radiator neck clean and inspect for corrosion, pitting or damage. Clean with a lint-free rag before fitting the new cap.
• Fit the cap by pressing down and turning clockwise until fully seated. Do not cross-thread.
• Top up coolant to the correct level (usually the MAX mark on the expansion tank, or the base of the filler neck on older systems) using the coolant type specified by the vehicle manufacturer.
• After fitting, run the engine to operating temperature with the heater set to maximum heat to bleed air from the system. Check coolant level after the first heat cycle and top up if needed.
• Inspect for coolant leaks around the cap seal after the first drive. A slight damp ring is normal during the first pressure cycle; persistent seepage indicates a fitment or sealing issue.

Common Questions

How do I know if this radiator cap is the right pressure?
Check the pressure rating stamped on your existing radiator cap. It's usually marked on the top face - common formats are "1.1", "1.10 bar", "16 psi", "110 kPa" or similar. All of these refer to the same 1.10 bar pressure. Using a cap with the wrong pressure rating can cause overheating, coolant loss, or hose/radiator damage.

Why is a metal cap better than a plastic one?
Metal caps resist thermal cycling better than plastic ones. Plastic radiator caps are prone to warping, cracking, and seal-face distortion as they age and heat-cycle. A metal cap is more durable and more consistent in its pressure relief performance over a long service life.

My car is not on the fitment list - will this cap still fit?
Possibly - many vehicles across different brands share the same radiator cap specification (1.10 bar, 44 mm diameter, 15 mm height). Match the OE number from your existing cap against the list in the OEM Reference Numbers section. If the number matches, the cap fits. If it doesn't match, the cap may still physically fit but with different pressure characteristics - contact us for advice.

Should I replace the radiator cap with my radiator?
Yes - it's good practice to replace the radiator cap at the same time as the radiator or during any significant cooling system service. The cap seal is a common failure point, and fitting a new radiator with a worn cap can lead to cooling problems that look like the new radiator is faulty when the cap is the actual cause.

What symptoms indicate a failing radiator cap?
Common symptoms include: overheating or temperature gauge climbing under load, coolant loss with no visible leak, coolant appearing in the expansion tank overflow, white crusty residue around the cap seal, hissing from the cap area when the engine is warm, or a perished / hardened rubber seal on inspection. If you see any of these, replacing the cap is an inexpensive first step.

Is this an OEM or aftermarket part?
The cap is supplied with matching physical specifications and is cross-referenced against the OE part numbers listed in the OEM Reference Numbers section. Match at least one OE number to your original cap before ordering. Contact us with your vehicle details if verification is needed.

How do I confirm fitment if my vehicle is not listed?
Remove your existing radiator cap (engine cold only) and check the pressure rating, outer diameter of the cap body, and height of the sealing section. If all three match the specifications of this cap (1.10 bar, 44 mm, 15 mm), the cap will fit.