Honda Civic Si Transmission Replacement Cost: What Owners Should Expect

Expect to pay roughly $2,500–$5,000 for a used gearbox installed, $3,500–$6,500 for a remanufactured unit at an independent shop, or $5,500–$8,500+ at a Honda dealer for a brand-new OEM transmission—figures that reflect 2024–2025 U.S. market rates. The Civic Si is a manual-only model, and total cost varies by generation, parts choice (used, reman, new), regional labor rates, and whether you add a clutch, flywheel, and mounts while the transmission is out. Below is a detailed breakdown to help you budget and decide the best route for your car.

What’s Included in the Price

Transmission replacement is more than swapping a gearbox. Most shops will recommend related parts and services while access is open to prevent repeat labor later. Here’s what typically makes up the final invoice.

• Transmission unit: used/salvage, remanufactured, or new OEM
• Labor: removal and installation (typically 6–10 book hours depending on model year)
• Clutch kit: pressure plate, disc, release (throwout) bearing; often replaced proactively
• Flywheel: resurfacing or replacement if worn or hot-spotted
• Fluids and seals: Honda MTF and any axle/trans seals disturbed during service
• Engine/trans mounts: replaced if cracked or collapsed
• Ancillaries: alignment (if subframe was dropped), hardware, and potential core charges on reman units

Together, these items determine your installed total. Skipping clutch and flywheel can lower the bill, but most shops advise doing them while the transmission is out to avoid paying labor twice.

Installed Price by Parts Choice

Your choice of transmission—used, remanufactured, or new OEM—has the biggest effect on cost. Here’s how typical U.S. installed totals compare in 2024–2025.

• Used/salvage gearbox: $2,500–$5,000 installed (unit often $700–$1,800; shorter warranty, unknown history)
• Remanufactured unit: $3,500–$6,500 installed (unit typically $2,000–$3,500; 12–36 month warranty common)
• New OEM from Honda: $5,500–$8,500+ installed (unit often $4,000–$6,000; strongest parts availability/warranty, highest price)

A used unit is cheapest but riskiest; remanufactured strikes a balance of cost and reliability; new OEM is premium-priced but predictable, especially on newer generations.

Labor Time and Rates

Manual transmission R&R time on the Civic Si typically books at 6–10 hours depending on generation and whether the subframe and suspension components must be dropped. U.S. labor rates in 2025 commonly range from $120–$200 per hour at independent shops and $170–$250 per hour at dealerships in major metros. That puts labor alone between roughly $750 and $2,300 before parts.

Model-Year Nuances for the Civic Si

While the Si has been manual-only across modern generations, small differences affect time and parts availability.

• 2006–2011 (K20Z3) and 2012–2015 (K24Z7): Widely supported in the aftermarket; typical book time around 6.5–8.0 hours; synchro wear (notably 3rd) is a known issue on some cars.
• 2017–2020 (1.5T, 6MT with LSD): Slightly higher labor time in many guides (about 7–9 hours); parts availability is good; unit costs trend mid-range.
• 2022–present (11th gen 6MT): Newer units can be pricier and may have longer lead times; labor ~7.5–9.5 hours at many shops; dealer pricing skews higher.

If your Si is modified (clutch upgrades, mounts, axles), expect minor time variances and the need to match parts to your build.

What Else You’ll Likely Replace (and What It Costs)

Because the transmission must come out, shops often recommend related wear items. These add to the total but can prevent future labor duplication.

1. Clutch kit: $300–$800 parts; minimal added labor since the box is already out
2. Flywheel: $200–$600 for new; resurfacing (when applicable) is cheaper but not always recommended
3. Mounts: $100–$400 in parts if worn or oil-soaked
4. Seals and fluid: $40–$150; Honda MTF is inexpensive but essential
5. Alignment: $100–$200 if subframe/suspension components are loosened

Bundling these items during transmission replacement usually saves money over addressing them later, especially the clutch and flywheel.

Replace vs. Rebuild

For manual Si gearboxes with isolated issues (e.g., grinding into 2nd/3rd from worn synchros), a rebuild by a specialist can be cost-effective if the case and major hard parts are good.

• Synchro and bearing refresh: commonly $1,500–$3,000 parts and labor at a specialty shop
• Full performance-oriented rebuilds (gears, LSD service, upgraded synchros): $2,500–$4,500+
• Availability caveat: Many general repair shops don’t rebuild manuals in-house; you may need a transmission specialist

If multiple hard parts are damaged, costs can approach or exceed a reman unit, making replacement more sensible.

Factors That Move the Price Up or Down

Several variables explain why quotes for the same job can vary widely.

• Region and shop type: Dealer vs. independent, urban vs. rural labor rates
• Parts sourcing: Used local yard vs. national reman supplier vs. Honda OEM
• Warranty length: Longer coverage typically costs more
• Add-ons: Clutch/flywheel, mounts, seals, alignment
• Vehicle condition: Rust, aftermarket parts, prior repairs that complicate removal

When comparing quotes, ensure each includes the same scope, parts quality, and warranty so you’re evaluating like-for-like bids.

How to Get an Accurate Quote

To tighten the range and avoid surprises, come prepared and ask focused questions.

1. Provide your VIN and mileage so the shop can pull exact fitment and labor times.
2. Decide on parts strategy (used vs. reman vs. new) and ask for line-item pricing and warranty.
3. Request add-on pricing for clutch kit, flywheel, mounts, and alignment.
4. Ask for the estimated labor hours and the shop’s hourly rate in writing.
5. Clarify core charges, lead times, and whether any reprogramming or special procedures are needed (rare for manuals).

A transparent written estimate with parts brands and warranty terms is the best way to compare shops and avoid change orders.

Ways to Save Without Cutting Corners

If the top-line number feels steep, consider these approaches that reduce cost while protecting reliability.

• Choose a reputable remanufactured unit with a solid warranty instead of new OEM.
• Source a low-mile used gearbox with proof (VIN, mileage, warranty) from a trusted recycler.
• Bundle the clutch kit now to avoid duplicating labor later.
• Get multiple quotes from independent Honda/performance specialists—not just the dealer.
• Provide your own parts only if the shop permits and will still warranty labor (policies vary).

These steps can trim hundreds to thousands off the job while keeping risk in check.

Bottom Line

For a Honda Civic Si, plan on $3,500–$6,500 installed for a remanufactured replacement at an independent shop, with budget room to $8,500+ at a dealer for a brand-new OEM unit. A used gearbox can land closer to $2,500–$5,000, while a targeted rebuild may be viable if your issue is mainly synchros or bearings. Final cost hinges on your parts choice, local labor rates, and whether you add a clutch and flywheel while you’re in there.

Summary

Replacing a Honda Civic Si transmission typically costs $2,500–$8,500+ in the U.S., depending on whether you choose used, remanufactured, or new OEM, and on labor rates and add-on parts like a clutch and flywheel. Expect 6–10 hours of labor, higher dealer rates, and better value from reman units with solid warranties. For synchro-related issues, a specialist rebuild can be a cost-effective alternative to full replacement.

Can Honda transmission be fixed?

A worn or damaged transmission makes driving difficult and unsafe, if not impossible. The transmission is very complex and contains hundreds of different components. The failure of just one component can easily affect the entire transmission. If you have a transmission problem, your Honda dealer can fix it.

How much does it cost to replace a transmission in a Honda Civic?

New Transmission: $2000 to $4000 (parts and labor)

How long does a transmission last in a Honda Civic?

150,000 miles
Honda Civic’s Transmission and Alternator Life Span
Most car transmission lines wear out at the 100,000-mile mark. However, a Honda Civic’s transmission can last an average of 150,000 miles.

Is it cheaper to replace or repair a transmission?

Rebuilding: Typically costs 30-50% less than a new transmission. The price can vary based on the make and model of the vehicle and the extent of the repairs needed. Replacement: A new transmission can be significantly more expensive, especially for luxury or high-performance vehicles.