The Sims 4 September Update: Sim Autonomy, New Free Items

The Sims 4 rolled out its September Quality of Life update on September 22, and it is the biggest autonomy-focused patch the base game has had in years. Rather than a new pack, this is a maintenance pass built straight from player complaints on Discord, Reddit and the EA Forums, and it lands as version 1.128.90.1030 on PC, 1.128.90.1230 on Mac, and 2.39 on console.

01What's Actually in Patch 1.128

EA calls this a "hefty Quality of Life (QoL) update," and the numbers back that up: more than 95 bug fixes across the base game and packs, ten of which target crashes and stability issues on PC, Mac and console. The patch went live at 10AM PT / 7PM CET / 6PM BT across every supported platform at once, so there's no staggered rollout to wait on.

Unlike a typical pack-tied update, none of this requires owning a specific Expansion or Game Pack — the autonomy and bug-fix changes apply to every Sims 4 household, whether you're running the free base game or a fully loaded install.

02Sim Autonomy Gets Its Biggest Rework in Years

The patch's headline feature is a broad pass on how Sims behave when you're not directing them. Sims now maintain eye contact during conversations instead of staring off mid-chat, and they'll head to an actual bathroom sink to wash their hands rather than detouring to the kitchen. Low-energy Sims no longer randomly interrupt what they're doing to wander off and address an unrelated need, which was one of the most-reported annoyances on the EA Forums.

Autonomous dancing has also been reined in — Sims who dislike dancing will no longer start dancing on their own, and will stop if a song they dislike comes on. The frequency of autonomous snow angels and snowman-building has been reduced too, along with fixes to NPC karaoke resets during festivals and new cooldowns on serenade interactions so they don't fire back-to-back.

03Relationship and Family Dynamics Tuning

Players who found romance fading too fast should notice a difference: Romantic Satisfaction from the Lovestruck feature now decays more slowly, and inactive households stop having their satisfaction quietly drained in the background while you're playing someone else. Family Dynamics from Growing Together have been rebalanced as well, so common dynamics trigger less often while rarer ones get more chances to appear. Sims with poor compatibility are also less likely to autonomously start interactions with each other, which should cut down on awkward forced conversations between Sims who don't get along.

04Free Content for Children and Toddlers

Alongside the fixes, the update adds a batch of free Create-a-Sim and Build Mode content aimed at younger Sims. Build Mode gets a Crayon Chronicle notebook, art frames, a paint palette, wall murals, and new playroom furniture including a dino aquarium. In Create-a-Sim, children get sweatshirts, polo shirts, shorts, sequined and ruffled tops, jeans and new hairstyles, while toddlers get t-shirts, colorful glasses and denim dresses — all free additions to the base game rather than a paid Kit.

05Bug Fixes Worth Knowing About

Beyond the headline autonomy work, the patch quietly fixes a long list of specific annoyances. Married couples will no longer get reverted to "Partners" status when entering Create-a-Sim through Custom Tattoo planning or Plan Outfits. Sims getting stuck or frozen in interaction queues has been addressed, along with infants stacking or popping out of cribs and playmats. The team also fixed Gallery loading errors, roof trim clipping through platforms and half-walls, and a top console crash tied to controller navigation — EA says it reworked how controller navigation grids are handled to fix it, along with general memory-usage improvements on console.

The toddler "Read to Children" interaction from storybooks has also been corrected, after Sims were routing and positioning themselves incorrectly during the animation. Expanded Buff View will no longer close on its own when the game is running at 2x speed or faster, and children can no longer spend excessive, uninterrupted stretches on playground swings.

EA Help's rundown of the September Quality of Life update, posted alongside the patch's release on September 22, 2026.

06What's Next

EA hasn't published a fixed date for the next update, but this patch continues the studio's pattern of monthly-ish Quality of Life passes between paid content drops, following August's release notes and the Laundry List EA posted on September 15 previewing most of what shipped here. If you're deep into a heavily modded save, treat the next few days as a good window to check your Script Mods and custom animations against the new build before assuming something's broken — an autonomy-focused patch this size is exactly the kind that occasionally trips up older mods until their creators catch up.