AUTOSAVER88 Radiator Compatible with Civic K20Z2/Z3 R18A1/A4/A9/Z1

In this review of the AUTOSAVER88 radiator for Civic 1.8L manual transmissions, the bottom line is straightforward: it is a budget-friendly, direct-fit replacement for drivers who need a functioning, easy-to-install radiator that closely matches OE performance. The reviewer found the radiator best suited to owners of Civic LX, LXS, EX, EXS, GX, DX and Sport models with the specified engines; it offers high-density fins and a leak-tested aluminum core, but buyers should note this is a MANUAL transmission radiator and does not fit A/T or hybrid sedans.

Key Features

• Direct fit: Built to OE standards for straightforward installation in compatible Civic models without major modification.
• High-efficiency core: High density multi-louvered fins increase cooling performance for reliable temperature control in varied weather.
• Leakproof construction: Uses a high-grade plastic tank and aluminum core and is subjected to leak tests before shipment.
• OEM compatibility: Replacement for OEM part numbers 19010RNBA01 and 19010RNBC51, helping match original mounting and hose locations.
• Complete package: Ships as a new complete radiator with a user manual included for reference during installation.

Who It's For

This radiator is aimed at Civic owners with a manual transmission and one of the listed 1.8L engines who need an affordable replacement that installs with minimal fuss. It suits DIY mechanics comfortable with radiator replacement or a professional installer following the included manual and OE-fit design.

It is not appropriate for Civic hybrid sedans, automatic transmission vehicles, or owners who require a unit that includes a radiator cap. Those needing extended warranty-backed options or OEM dealer parts may want to compare alternatives before purchasing.

Pros & Cons

Pros

• Good value: customers report a budget-friendly price relative to dealer replacements.
• Fit and function: many buyers found the radiator fits properly and returns normal engine operating temperatures.
• Build quality: aluminum core with multi-louvered fins and leak-tested assembly provide confidence for initial use.

Cons

• Durability concerns: a minority of users reported leakage after about a month, so long-term reliability may vary.
• Missing radiator cap: the package does not include a radiator cap, which must be supplied separately.

Specifications

Brand	AUTOSAVER88
Compatibility	Civic LX LXS EX EXS GX DX DXG Sport 1.8L (manual only)
Not compatible with	Civic Hybrid Sedan and automatic transmission models
OEM replacement numbers	19010RNBA01, 19010RNBC51
Construction	Aluminum core with high-grade plastic tank
Package contents	1x complete radiator, 1x user manual (cap not included)

Our Verdict

The AUTOSAVER88 radiator is a sensible value choice for Civic owners with the correct 1.8L manual transmission fitment who want an OE-style direct fit and reasonable cooling performance. It is cost-effective and often installs without trouble, but buyers should be aware of isolated reports of early leakage and the omission of a radiator cap; consider professional installation and inspect for leaks after installation.

Frequently Asked Questions

Will this radiator fit any Civic?
This radiator fits Civic LX, LXS, EX, EXS, GX, DX, DXG and Sport 1.8L models with a manual transmission and is not compatible with hybrid sedans or automatic transmissions.

Does the package include a radiator cap?
No, the radiator cap is not included and must be purchased separately or reused from the original unit if compatible.

Is installation difficult?
Installation is straightforward for experienced DIYers and professionals because it is a direct-fit OE-style radiator, but professional installation is recommended to ensure proper leak checks and coolant system bleeding.